Greatest Common Factor of 309 and 315

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 309, 315 i.e. 3 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 309 and 315 is 3.

GCF(309,315) = 3

GCF of 309 and 315

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

GCF of:
and

Greatest Common Factor of 309 and 315

GCF of 309 and 315 is 3

Prime Factorization of 309


3 309
103 103
1

Prime factors of 309 are 3,103. Prime factorization of 309 in exponential form is:

309 = 31×1031

Prime Factorization of 315


3 315
3 105
5 35
7 7
1

Prime factors of 315 are 3,5,7. Prime factorization of 315 in exponential form is:

315 = 32×51×71

∴ So by taking common prime factors GCF of 309 and 315 is 3

Greatest Common Factor of 309 and 315 by matching factors method

Factors of 309

List of positive integer factors of 309 that divides 309 without a remainder.

1,3,103,309

Factors of 315

List of positive integer factors of 315 that divides 315 without a remainder.

1,3,5,7,9,15,21,35,45,63,105,315

Greatest Common Factor

We found the factors and prime factorization of 309 and 315. The biggest common factor number is the GCF number.
So the greatest common factor 309 and 315 is 3.

Also check out the Least Common Multiple of 309 and 315

Properties of GCF 309 and 315

(i) The GCF of 309 and 315 is associative

GCF of 309 and 315 = GCF of 315 and 309

Related Greatest Common Factor of 309

Related Greatest Common Factor of 315

Frequently Asked Questions on GCF of 309 and 315

1. What is the GCF of 309 and 315?

Answer: GCF of 309 and 315 is 3.

2. What are the Factors of 309?

Answer: Factors of 309 are 1, 3, 103, 309. There are 4 integers that are factors of 309. The greatest factor of 309 is 309.

3. What are the Factors of 315?

Answer: Factors of 315 are 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315. There are 12 integers that are factors of 315. The greatest factor of 315 is 315.

4. How to Find the GCF of 309 and 315?

Answer:

Greatest Common Factor of 309 and 315 = 3

Step 1: Find the prime factorization of 309

309 = 3 x 103

Step 2: Find the prime factorization of 315

315 = 3 x 3 x 5 x 7

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

GCF = 3

Step 4: Therefore, the greatest common factor of 309 and 315 is 3