Greatest Common Factor of 1515 and 1521

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 1515, 1521 i.e. 3 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1515 and 1521 is 3.

GCF(1515,1521) = 3

GCF of 1515 and 1521

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

GCF of:
and

Greatest Common Factor of 1515 and 1521

GCF of 1515 and 1521 is 3

Prime Factorization of 1515


3 1515
5 505
101 101
1

Prime factors of 1515 are 3,5,101. Prime factorization of 1515 in exponential form is:

1515 = 31×51×1011

Prime Factorization of 1521


3 1521
3 507
13 169
13 13
1

Prime factors of 1521 are 3,13. Prime factorization of 1521 in exponential form is:

1521 = 32×132

∴ So by taking common prime factors GCF of 1515 and 1521 is 3

Greatest Common Factor of 1515 and 1521 by matching factors method

Factors of 1515

List of positive integer factors of 1515 that divides 1515 without a remainder.

1,3,5,15,101,303,505,1515

Factors of 1521

List of positive integer factors of 1521 that divides 1521 without a remainder.

1,3,9,13,39,117,169,507,1521

Greatest Common Factor

We found the factors and prime factorization of 1515 and 1521. The biggest common factor number is the GCF number.
So the greatest common factor 1515 and 1521 is 3.

Also check out the Least Common Multiple of 1515 and 1521

Properties of GCF 1515 and 1521

(i) The GCF of 1515 and 1521 is associative

GCF of 1515 and 1521 = GCF of 1521 and 1515

Related Greatest Common Factor of 1515

Related Greatest Common Factor of 1521

Frequently Asked Questions on GCF of 1515 and 1521

1. What is the GCF of 1515 and 1521?

Answer: GCF of 1515 and 1521 is 3.

2. What are the Factors of 1515?

Answer: Factors of 1515 are 1, 3, 5, 15, 101, 303, 505, 1515. There are 8 integers that are factors of 1515. The greatest factor of 1515 is 1515.

3. What are the Factors of 1521?

Answer: Factors of 1521 are 1, 3, 9, 13, 39, 117, 169, 507, 1521. There are 9 integers that are factors of 1521. The greatest factor of 1521 is 1521.

4. How to Find the GCF of 1515 and 1521?

Answer:

Greatest Common Factor of 1515 and 1521 = 3

Step 1: Find the prime factorization of 1515

1515 = 3 x 5 x 101

Step 2: Find the prime factorization of 1521

1521 = 3 x 3 x 13 x 13

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 1515 and 1521 is 3