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The list of **all positive divisors** (that is, the list of all integers that **divide 22**) is as follows :

Accordingly:

**990** is multiplo of **1**

**990** is multiplo of **2**

**990** is multiplo of **3**

**990** is multiplo of **5**

**990** is multiplo of **6**

**990** is multiplo of **9**

**990** is multiplo of **10**

**990** is multiplo of **11**

**990** is multiplo of **15**

**990** is multiplo of **18**

**990** is multiplo of **22**

**990** is multiplo of **30**

**990** is multiplo of **33**

**990** is multiplo of **45**

**990** is multiplo of **55**

**990** is multiplo of **66**

**990** is multiplo of **90**

**990** is multiplo of **99**

**990** is multiplo of **110**

**990** is multiplo of **165**

**990** is multiplo of **198**

**990** is multiplo of **330**

**990** is multiplo of **495**

**990** has **23 positive divisors **

In addition we can say of the number **990 that it is even**

990 is an even number, as it is divisible by 2 : 990/2 = 495

The factors for 990 are all the numbers between -990 and 990 , which divide 990 without leaving any remainder. Since 990 divided by -990 is an integer, -990 is a factor of 990 .

Since 990 divided by -990 is a whole number, -990 is a factor of 990

Since 990 divided by -495 is a whole number, -495 is a factor of 990

Since 990 divided by -330 is a whole number, -330 is a factor of 990

Since 990 divided by -198 is a whole number, -198 is a factor of 990

Since 990 divided by -165 is a whole number, -165 is a factor of 990

Since 990 divided by -110 is a whole number, -110 is a factor of 990

Since 990 divided by -99 is a whole number, -99 is a factor of 990

Since 990 divided by -90 is a whole number, -90 is a factor of 990

Since 990 divided by -66 is a whole number, -66 is a factor of 990

Since 990 divided by -55 is a whole number, -55 is a factor of 990

Since 990 divided by -45 is a whole number, -45 is a factor of 990

Since 990 divided by -33 is a whole number, -33 is a factor of 990

Since 990 divided by -30 is a whole number, -30 is a factor of 990

Since 990 divided by -22 is a whole number, -22 is a factor of 990

Since 990 divided by -18 is a whole number, -18 is a factor of 990

Since 990 divided by -15 is a whole number, -15 is a factor of 990

Since 990 divided by -11 is a whole number, -11 is a factor of 990

Since 990 divided by -10 is a whole number, -10 is a factor of 990

Since 990 divided by -9 is a whole number, -9 is a factor of 990

Since 990 divided by -6 is a whole number, -6 is a factor of 990

Since 990 divided by -5 is a whole number, -5 is a factor of 990

Since 990 divided by -3 is a whole number, -3 is a factor of 990

Since 990 divided by -2 is a whole number, -2 is a factor of 990

Since 990 divided by -1 is a whole number, -1 is a factor of 990

Since 990 divided by 1 is a whole number, 1 is a factor of 990

Since 990 divided by 2 is a whole number, 2 is a factor of 990

Since 990 divided by 3 is a whole number, 3 is a factor of 990

Since 990 divided by 5 is a whole number, 5 is a factor of 990

Since 990 divided by 6 is a whole number, 6 is a factor of 990

Since 990 divided by 9 is a whole number, 9 is a factor of 990

Since 990 divided by 10 is a whole number, 10 is a factor of 990

Since 990 divided by 11 is a whole number, 11 is a factor of 990

Since 990 divided by 15 is a whole number, 15 is a factor of 990

Since 990 divided by 18 is a whole number, 18 is a factor of 990

Since 990 divided by 22 is a whole number, 22 is a factor of 990

Since 990 divided by 30 is a whole number, 30 is a factor of 990

Since 990 divided by 33 is a whole number, 33 is a factor of 990

Since 990 divided by 45 is a whole number, 45 is a factor of 990

Since 990 divided by 55 is a whole number, 55 is a factor of 990

Since 990 divided by 66 is a whole number, 66 is a factor of 990

Since 990 divided by 90 is a whole number, 90 is a factor of 990

Since 990 divided by 99 is a whole number, 99 is a factor of 990

Since 990 divided by 110 is a whole number, 110 is a factor of 990

Since 990 divided by 165 is a whole number, 165 is a factor of 990

Since 990 divided by 198 is a whole number, 198 is a factor of 990

Since 990 divided by 330 is a whole number, 330 is a factor of 990

Since 990 divided by 495 is a whole number, 495 is a factor of 990

Multiples of 990 are all integers divisible by 990 , i.e. the remainder of the full division by 990 is zero. There are infinite multiples of 990. The smallest multiples of 990 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 990 since 0 × 990 = 0

990 : in fact, 990 is a multiple of itself, since 990 is divisible by 990 (it was 990 / 990 = 1, so the rest of this division is zero)

etc.

It is possible to determine using mathematical techniques whether an integer is prime or not.

for 990, the answer is:
**No, 990 is not a prime number**.

To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 990). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 31.464 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.

More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.

Previous Numbers: ... 988, 989

Previous prime number: 983

Next prime number: 991

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