What is the Greatest Common Factor of 9615 and 9621?

Greatest common factor (GCF) of 9615 and 9621 is 3.

GCF(9615,9621) = 3

We will now calculate the prime factors of 9615 and 9621, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9615 and 9621.

How to find the GCF of 9615 and 9621?

We will first find the prime factorization of 9615 and 9621. After we will calculate the factors of 9615 and 9621 and find the biggest common factor number .

Step-1: Prime Factorization of 9615

Prime factors of 9615 are 3, 5, 641. Prime factorization of 9615 in exponential form is:

9615 = 3¹ × 5¹ × 641¹

Step-2: Prime Factorization of 9621

Prime factors of 9621 are 3, 1069. Prime factorization of 9621 in exponential form is:

9621 = 3² × 1069¹

Step-3: Factors of 9615

List of positive integer factors of 9615 that divides 9615 without a remainder.

1, 3, 5, 15, 641, 1923, 3205

Step-4: Factors of 9621

List of positive integer factors of 9621 that divides 9615 without a remainder.

1, 3, 9, 1069, 3207

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9615 and 9621. The biggest common factor number is the GCF number.
So the greatest common factor 9615 and 9621 is 3.

Also check out the Least Common Multiple of 9615 and 9621