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

Accordingly:

**225** is multiplo of **1**

**225** is multiplo of **3**

**225** is multiplo of **5**

**225** is multiplo of **9**

**225** is multiplo of **15**

**225** is multiplo of **25**

**225** is multiplo of **45**

**225** is multiplo of **75**

**225** has **8 positive divisors **

**225is an odd number**,as it is not divisible by 2

The factors for 225 are all the numbers between -225 and 225 , which divide 225 without leaving any remainder. Since 225 divided by -225 is an integer, -225 is a factor of 225 .

Since 225 divided by -225 is a whole number, -225 is a factor of 225

Since 225 divided by -75 is a whole number, -75 is a factor of 225

Since 225 divided by -45 is a whole number, -45 is a factor of 225

Since 225 divided by -25 is a whole number, -25 is a factor of 225

Since 225 divided by -15 is a whole number, -15 is a factor of 225

Since 225 divided by -9 is a whole number, -9 is a factor of 225

Since 225 divided by -5 is a whole number, -5 is a factor of 225

Since 225 divided by -3 is a whole number, -3 is a factor of 225

Since 225 divided by -1 is a whole number, -1 is a factor of 225

Since 225 divided by 1 is a whole number, 1 is a factor of 225

Since 225 divided by 3 is a whole number, 3 is a factor of 225

Since 225 divided by 5 is a whole number, 5 is a factor of 225

Since 225 divided by 9 is a whole number, 9 is a factor of 225

Since 225 divided by 15 is a whole number, 15 is a factor of 225

Since 225 divided by 25 is a whole number, 25 is a factor of 225

Since 225 divided by 45 is a whole number, 45 is a factor of 225

Since 225 divided by 75 is a whole number, 75 is a factor of 225

Multiples of 225 are all integers divisible by 225 , i.e. the remainder of the full division by 225 is zero. There are infinite multiples of 225. The smallest multiples of 225 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 225 since 0 × 225 = 0

225 : in fact, 225 is a multiple of itself, since 225 is divisible by 225 (it was 225 / 225 = 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 225, the answer is:
**No, 225 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 225). 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 15 ). 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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