What is the Greatest Common Factor of 12585 and 12591?

Greatest common factor (GCF) of 12585 and 12591 is 3.

GCF(12585,12591) = 3

We will now calculate the prime factors of 12585 and 12591, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12585 and 12591.

How to find the GCF of 12585 and 12591?

We will first find the prime factorization of 12585 and 12591. After we will calculate the factors of 12585 and 12591 and find the biggest common factor number .

Step-1: Prime Factorization of 12585

Prime factors of 12585 are 3, 5, 839. Prime factorization of 12585 in exponential form is:

12585 = 3¹ × 5¹ × 839¹

Step-2: Prime Factorization of 12591

Prime factors of 12591 are 3, 1399. Prime factorization of 12591 in exponential form is:

12591 = 3² × 1399¹

Step-3: Factors of 12585

List of positive integer factors of 12585 that divides 12585 without a remainder.

1, 3, 5, 15, 839, 2517, 4195

Step-4: Factors of 12591

List of positive integer factors of 12591 that divides 12585 without a remainder.

1, 3, 9, 1399, 4197

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12585 and 12591. The biggest common factor number is the GCF number.
So the greatest common factor 12585 and 12591 is 3.

Also check out the Least Common Multiple of 12585 and 12591