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

Accordingly:

**1995** is multiplo of **1**

**1995** is multiplo of **3**

**1995** is multiplo of **5**

**1995** is multiplo of **7**

**1995** is multiplo of **15**

**1995** is multiplo of **19**

**1995** is multiplo of **21**

**1995** is multiplo of **35**

**1995** is multiplo of **57**

**1995** is multiplo of **95**

**1995** is multiplo of **105**

**1995** is multiplo of **133**

**1995** is multiplo of **285**

**1995** is multiplo of **399**

**1995** is multiplo of **665**

**1995** has **15 positive divisors **

**1995is an odd number**,as it is not divisible by 2

The factors for 1995 are all the numbers between -1995 and 1995 , which divide 1995 without leaving any remainder. Since 1995 divided by -1995 is an integer, -1995 is a factor of 1995 .

Since 1995 divided by -1995 is a whole number, -1995 is a factor of 1995

Since 1995 divided by -665 is a whole number, -665 is a factor of 1995

Since 1995 divided by -399 is a whole number, -399 is a factor of 1995

Since 1995 divided by -285 is a whole number, -285 is a factor of 1995

Since 1995 divided by -133 is a whole number, -133 is a factor of 1995

Since 1995 divided by -105 is a whole number, -105 is a factor of 1995

Since 1995 divided by -95 is a whole number, -95 is a factor of 1995

Since 1995 divided by -57 is a whole number, -57 is a factor of 1995

Since 1995 divided by -35 is a whole number, -35 is a factor of 1995

Since 1995 divided by -21 is a whole number, -21 is a factor of 1995

Since 1995 divided by -19 is a whole number, -19 is a factor of 1995

Since 1995 divided by -15 is a whole number, -15 is a factor of 1995

Since 1995 divided by -7 is a whole number, -7 is a factor of 1995

Since 1995 divided by -5 is a whole number, -5 is a factor of 1995

Since 1995 divided by -3 is a whole number, -3 is a factor of 1995

Since 1995 divided by -1 is a whole number, -1 is a factor of 1995

Since 1995 divided by 1 is a whole number, 1 is a factor of 1995

Since 1995 divided by 3 is a whole number, 3 is a factor of 1995

Since 1995 divided by 5 is a whole number, 5 is a factor of 1995

Since 1995 divided by 7 is a whole number, 7 is a factor of 1995

Since 1995 divided by 15 is a whole number, 15 is a factor of 1995

Since 1995 divided by 19 is a whole number, 19 is a factor of 1995

Since 1995 divided by 21 is a whole number, 21 is a factor of 1995

Since 1995 divided by 35 is a whole number, 35 is a factor of 1995

Since 1995 divided by 57 is a whole number, 57 is a factor of 1995

Since 1995 divided by 95 is a whole number, 95 is a factor of 1995

Since 1995 divided by 105 is a whole number, 105 is a factor of 1995

Since 1995 divided by 133 is a whole number, 133 is a factor of 1995

Since 1995 divided by 285 is a whole number, 285 is a factor of 1995

Since 1995 divided by 399 is a whole number, 399 is a factor of 1995

Since 1995 divided by 665 is a whole number, 665 is a factor of 1995

Multiples of 1995 are all integers divisible by 1995 , i.e. the remainder of the full division by 1995 is zero. There are infinite multiples of 1995. The smallest multiples of 1995 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 1995 since 0 × 1995 = 0

1995 : in fact, 1995 is a multiple of itself, since 1995 is divisible by 1995 (it was 1995 / 1995 = 1, so the rest of this division is zero)

3990: in fact, 3990 = 1995 × 2

5985: in fact, 5985 = 1995 × 3

7980: in fact, 7980 = 1995 × 4

9975: in fact, 9975 = 1995 × 5

etc.

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

for 1995, the answer is:
**No, 1995 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 1995). 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 44.665 ). 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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