What is the Greatest Common Factor of 12978 and 12996?

Greatest common factor (GCF) of 12978 and 12996 is 18.

GCF(12978,12996) = 18

We will now calculate the prime factors of 12978 and 12996, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12978 and 12996.

How to find the GCF of 12978 and 12996?

We will first find the prime factorization of 12978 and 12996. After we will calculate the factors of 12978 and 12996 and find the biggest common factor number .

Step-1: Prime Factorization of 12978

Prime factors of 12978 are 2, 3, 7, 103. Prime factorization of 12978 in exponential form is:

12978 = 2¹ × 3² × 7¹ × 103¹

Step-2: Prime Factorization of 12996

Prime factors of 12996 are 2, 3, 19. Prime factorization of 12996 in exponential form is:

12996 = 2² × 3² × 19²

Step-3: Factors of 12978

List of positive integer factors of 12978 that divides 12978 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 103, 126, 206, 309, 618, 721, 927, 1442, 1854, 2163, 4326, 6489

Step-4: Factors of 12996

List of positive integer factors of 12996 that divides 12978 without a remainder.

1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 228, 342, 361, 684, 722, 1083, 1444, 2166, 3249, 4332, 6498

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12978 and 12996. The biggest common factor number is the GCF number.
So the greatest common factor 12978 and 12996 is 18.

Also check out the Least Common Multiple of 12978 and 12996