What is the Greatest Common Factor of 12940 and 12945?

Greatest common factor (GCF) of 12940 and 12945 is 5.

GCF(12940,12945) = 5

We will now calculate the prime factors of 12940 and 12945, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12940 and 12945.

How to find the GCF of 12940 and 12945?

We will first find the prime factorization of 12940 and 12945. After we will calculate the factors of 12940 and 12945 and find the biggest common factor number .

Step-1: Prime Factorization of 12940

Prime factors of 12940 are 2, 5, 647. Prime factorization of 12940 in exponential form is:

12940 = 2² × 5¹ × 647¹

Step-2: Prime Factorization of 12945

Prime factors of 12945 are 3, 5, 863. Prime factorization of 12945 in exponential form is:

12945 = 3¹ × 5¹ × 863¹

Step-3: Factors of 12940

List of positive integer factors of 12940 that divides 12940 without a remainder.

1, 2, 4, 5, 10, 20, 647, 1294, 2588, 3235, 6470

Step-4: Factors of 12945

List of positive integer factors of 12945 that divides 12940 without a remainder.

1, 3, 5, 15, 863, 2589, 4315

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12940 and 12945. The biggest common factor number is the GCF number.
So the greatest common factor 12940 and 12945 is 5.

Also check out the Least Common Multiple of 12940 and 12945