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

Accordingly:

**198** is multiplo of **1**

**198** is multiplo of **2**

**198** is multiplo of **3**

**198** is multiplo of **6**

**198** is multiplo of **9**

**198** is multiplo of **11**

**198** is multiplo of **18**

**198** is multiplo of **22**

**198** is multiplo of **33**

**198** is multiplo of **66**

**198** is multiplo of **99**

**198** has **11 positive divisors **

In addition we can say of the number **198 that it is even**

198 is an even number, as it is divisible by 2 : 198/2 = 99

The factors for 198 are all the numbers between -198 and 198 , which divide 198 without leaving any remainder. Since 198 divided by -198 is an integer, -198 is a factor of 198 .

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

Since 198 divided by -99 is a whole number, -99 is a factor of 198

Since 198 divided by -66 is a whole number, -66 is a factor of 198

Since 198 divided by -33 is a whole number, -33 is a factor of 198

Since 198 divided by -22 is a whole number, -22 is a factor of 198

Since 198 divided by -18 is a whole number, -18 is a factor of 198

Since 198 divided by -11 is a whole number, -11 is a factor of 198

Since 198 divided by -9 is a whole number, -9 is a factor of 198

Since 198 divided by -6 is a whole number, -6 is a factor of 198

Since 198 divided by -3 is a whole number, -3 is a factor of 198

Since 198 divided by -2 is a whole number, -2 is a factor of 198

Since 198 divided by -1 is a whole number, -1 is a factor of 198

Since 198 divided by 1 is a whole number, 1 is a factor of 198

Since 198 divided by 2 is a whole number, 2 is a factor of 198

Since 198 divided by 3 is a whole number, 3 is a factor of 198

Since 198 divided by 6 is a whole number, 6 is a factor of 198

Since 198 divided by 9 is a whole number, 9 is a factor of 198

Since 198 divided by 11 is a whole number, 11 is a factor of 198

Since 198 divided by 18 is a whole number, 18 is a factor of 198

Since 198 divided by 22 is a whole number, 22 is a factor of 198

Since 198 divided by 33 is a whole number, 33 is a factor of 198

Since 198 divided by 66 is a whole number, 66 is a factor of 198

Since 198 divided by 99 is a whole number, 99 is a factor of 198

Multiples of 198 are all integers divisible by 198 , i.e. the remainder of the full division by 198 is zero. There are infinite multiples of 198. The smallest multiples of 198 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 198 since 0 × 198 = 0

198 : in fact, 198 is a multiple of itself, since 198 is divisible by 198 (it was 198 / 198 = 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 198, the answer is:
**No, 198 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 198). 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 14.071 ). 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.

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Next prime number: 199

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