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In addition we can say of the number **170 that it is even**

170 is an even number, as it is divisible by 2 : 170/2 = 85

The factors for 170 are all the numbers between -170 and 170 , which divide 170 without leaving any remainder. Since 170 divided by -170 is an integer, -170 is a factor of 170 .

Since 170 divided by -170 is a whole number, -170 is a factor of 170

Since 170 divided by -85 is a whole number, -85 is a factor of 170

Since 170 divided by -34 is a whole number, -34 is a factor of 170

Since 170 divided by -17 is a whole number, -17 is a factor of 170

Since 170 divided by -10 is a whole number, -10 is a factor of 170

Since 170 divided by -5 is a whole number, -5 is a factor of 170

Since 170 divided by -2 is a whole number, -2 is a factor of 170

Since 170 divided by -1 is a whole number, -1 is a factor of 170

Since 170 divided by 1 is a whole number, 1 is a factor of 170

Since 170 divided by 2 is a whole number, 2 is a factor of 170

Since 170 divided by 5 is a whole number, 5 is a factor of 170

Since 170 divided by 10 is a whole number, 10 is a factor of 170

Since 170 divided by 17 is a whole number, 17 is a factor of 170

Since 170 divided by 34 is a whole number, 34 is a factor of 170

Since 170 divided by 85 is a whole number, 85 is a factor of 170

Multiples of 170 are all integers divisible by 170 , i.e. the remainder of the full division by 170 is zero. There are infinite multiples of 170. The smallest multiples of 170 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 170 since 0 × 170 = 0

170 : in fact, 170 is a multiple of itself, since 170 is divisible by 170 (it was 170 / 170 = 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 170, the answer is:
**No, 170 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 170). 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 13.038 ). 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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