What is the Greatest Common Factor of 78138 and 78156?

Greatest common factor (GCF) of 78138 and 78156 is 18.

GCF(78138,78156) = 18

We will now calculate the prime factors of 78138 and 78156, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78138 and 78156.

How to find the GCF of 78138 and 78156?

We will first find the prime factorization of 78138 and 78156. After we will calculate the factors of 78138 and 78156 and find the biggest common factor number .

Step-1: Prime Factorization of 78138

Prime factors of 78138 are 2, 3, 1447. Prime factorization of 78138 in exponential form is:

78138 = 2¹ × 3³ × 1447¹

Step-2: Prime Factorization of 78156

Prime factors of 78156 are 2, 3, 13, 167. Prime factorization of 78156 in exponential form is:

78156 = 2² × 3² × 13¹ × 167¹

Step-3: Factors of 78138

List of positive integer factors of 78138 that divides 78138 without a remainder.

1, 2, 3, 6, 9, 18, 27, 54, 1447, 2894, 4341, 8682, 13023, 26046, 39069

Step-4: Factors of 78156

List of positive integer factors of 78156 that divides 78138 without a remainder.

1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 167, 234, 334, 468, 501, 668, 1002, 1503, 2004, 2171, 3006, 4342, 6012, 6513, 8684, 13026, 19539, 26052, 39078

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78138 and 78156. The biggest common factor number is the GCF number.
So the greatest common factor 78138 and 78156 is 18.

Also check out the Least Common Multiple of 78138 and 78156