What is the Greatest Common Factor of 12615 and 12621?

Greatest common factor (GCF) of 12615 and 12621 is 3.

GCF(12615,12621) = 3

We will now calculate the prime factors of 12615 and 12621, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12615 and 12621.

How to find the GCF of 12615 and 12621?

We will first find the prime factorization of 12615 and 12621. After we will calculate the factors of 12615 and 12621 and find the biggest common factor number .

Step-1: Prime Factorization of 12615

Prime factors of 12615 are 3, 5, 29. Prime factorization of 12615 in exponential form is:

12615 = 3¹ × 5¹ × 29²

Step-2: Prime Factorization of 12621

Prime factors of 12621 are 3, 7, 601. Prime factorization of 12621 in exponential form is:

12621 = 3¹ × 7¹ × 601¹

Step-3: Factors of 12615

List of positive integer factors of 12615 that divides 12615 without a remainder.

1, 3, 5, 15, 29, 87, 145, 435, 841, 2523, 4205

Step-4: Factors of 12621

List of positive integer factors of 12621 that divides 12615 without a remainder.

1, 3, 7, 21, 601, 1803, 4207

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12615 and 12621. The biggest common factor number is the GCF number.
So the greatest common factor 12615 and 12621 is 3.

Also check out the Least Common Multiple of 12615 and 12621