Greatest Common Factor of 165 and 170

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 165, 170 i.e. 5 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 165 and 170 is 5.

GCF(165,170) = 5

GCF of 165 and 170

Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;

GCF of:
and

Greatest Common Factor of 165 and 170

GCF of 165 and 170 is 5

Prime Factorization of 165


3 165
5 55
11 11
1

Prime factors of 165 are 3,5,11. Prime factorization of 165 in exponential form is:

165 = 31×51×111

Prime Factorization of 170


2 170
5 85
17 17
1

Prime factors of 170 are 2,5,17. Prime factorization of 170 in exponential form is:

170 = 21×51×171

∴ So by taking common prime factors GCF of 165 and 170 is 5

Greatest Common Factor of 165 and 170 by matching factors method

Factors of 165

List of positive integer factors of 165 that divides 165 without a remainder.

1,3,5,11,15,33,55,165

Factors of 170

List of positive integer factors of 170 that divides 170 without a remainder.

1,2,5,10,17,34,85,170

Greatest Common Factor

We found the factors and prime factorization of 165 and 170. The biggest common factor number is the GCF number.
So the greatest common factor 165 and 170 is 5.

Also check out the Least Common Multiple of 165 and 170

Properties of GCF 165 and 170

(i) The GCF of 165 and 170 is associative

GCF of 165 and 170 = GCF of 170 and 165

Related Greatest Common Factor of 165

Related Greatest Common Factor of 170

Frequently Asked Questions on GCF of 165 and 170

1. What is the GCF of 165 and 170?

Answer: GCF of 165 and 170 is 5.

2. What are the Factors of 165?

Answer: Factors of 165 are 1, 3, 5, 11, 15, 33, 55, 165. There are 8 integers that are factors of 165. The greatest factor of 165 is 165.

3. What are the Factors of 170?

Answer: Factors of 170 are 1, 2, 5, 10, 17, 34, 85, 170. There are 8 integers that are factors of 170. The greatest factor of 170 is 170.

4. How to Find the GCF of 165 and 170?

Answer:

Greatest Common Factor of 165 and 170 = 5

Step 1: Find the prime factorization of 165

165 = 3 x 5 x 11

Step 2: Find the prime factorization of 170

170 = 2 x 5 x 17

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = 5

Step 4: Therefore, the greatest common factor of 165 and 170 is 5