Greatest Common Factor of 615 and 621

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 615, 621 i.e. 3 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 615 and 621 is 3.

GCF(615,621) = 3

GCF of 615 and 621

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

GCF of:
and

Greatest Common Factor of 615 and 621

GCF of 615 and 621 is 3

Prime Factorization of 615


3 615
5 205
41 41
1

Prime factors of 615 are 3,5,41. Prime factorization of 615 in exponential form is:

615 = 31×51×411

Prime Factorization of 621


3 621
3 207
3 69
23 23
1

Prime factors of 621 are 3,23. Prime factorization of 621 in exponential form is:

621 = 33×231

∴ So by taking common prime factors GCF of 615 and 621 is 3

Greatest Common Factor of 615 and 621 by matching factors method

Factors of 615

List of positive integer factors of 615 that divides 615 without a remainder.

1,3,5,15,41,123,205,615

Factors of 621

List of positive integer factors of 621 that divides 621 without a remainder.

1,3,9,23,27,69,207,621

Greatest Common Factor

We found the factors and prime factorization of 615 and 621. The biggest common factor number is the GCF number.
So the greatest common factor 615 and 621 is 3.

Also check out the Least Common Multiple of 615 and 621

Properties of GCF 615 and 621

(i) The GCF of 615 and 621 is associative

GCF of 615 and 621 = GCF of 621 and 615

Related Greatest Common Factor of 615

Related Greatest Common Factor of 621

Frequently Asked Questions on GCF of 615 and 621

1. What is the GCF of 615 and 621?

Answer: GCF of 615 and 621 is 3.

2. What are the Factors of 615?

Answer: Factors of 615 are 1, 3, 5, 15, 41, 123, 205, 615. There are 8 integers that are factors of 615. The greatest factor of 615 is 615.

3. What are the Factors of 621?

Answer: Factors of 621 are 1, 3, 9, 23, 27, 69, 207, 621. There are 8 integers that are factors of 621. The greatest factor of 621 is 621.

4. How to Find the GCF of 615 and 621?

Answer:

Greatest Common Factor of 615 and 621 = 3

Step 1: Find the prime factorization of 615

615 = 3 x 5 x 41

Step 2: Find the prime factorization of 621

621 = 3 x 3 x 3 x 23

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 615 and 621 is 3