What is the Greatest Common Factor of 12645 and 12660?

Greatest common factor (GCF) of 12645 and 12660 is 15.

GCF(12645,12660) = 15

We will now calculate the prime factors of 12645 and 12660, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12645 and 12660.

How to find the GCF of 12645 and 12660?

We will first find the prime factorization of 12645 and 12660. After we will calculate the factors of 12645 and 12660 and find the biggest common factor number .

Step-1: Prime Factorization of 12645

Prime factors of 12645 are 3, 5, 281. Prime factorization of 12645 in exponential form is:

12645 = 3² × 5¹ × 281¹

Step-2: Prime Factorization of 12660

Prime factors of 12660 are 2, 3, 5, 211. Prime factorization of 12660 in exponential form is:

12660 = 2² × 3¹ × 5¹ × 211¹

Step-3: Factors of 12645

List of positive integer factors of 12645 that divides 12645 without a remainder.

1, 3, 5, 9, 15, 45, 281, 843, 1405, 2529, 4215

Step-4: Factors of 12660

List of positive integer factors of 12660 that divides 12645 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 211, 422, 633, 844, 1055, 1266, 2110, 2532, 3165, 4220, 6330

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12645 and 12660. The biggest common factor number is the GCF number.
So the greatest common factor 12645 and 12660 is 15.

Also check out the Least Common Multiple of 12645 and 12660