What is the Greatest Common Factor of 72129 and 72138?

Greatest common factor (GCF) of 72129 and 72138 is 3.

GCF(72129,72138) = 3

We will now calculate the prime factors of 72129 and 72138, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 72129 and 72138.

How to find the GCF of 72129 and 72138?

We will first find the prime factorization of 72129 and 72138. After we will calculate the factors of 72129 and 72138 and find the biggest common factor number .

Step-1: Prime Factorization of 72129

Prime factors of 72129 are 3, 24043. Prime factorization of 72129 in exponential form is:

72129 = 3¹ × 24043¹

Step-2: Prime Factorization of 72138

Prime factors of 72138 are 2, 3, 11, 1093. Prime factorization of 72138 in exponential form is:

72138 = 2¹ × 3¹ × 11¹ × 1093¹

Step-3: Factors of 72129

List of positive integer factors of 72129 that divides 72129 without a remainder.

1, 3, 24043

Step-4: Factors of 72138

List of positive integer factors of 72138 that divides 72129 without a remainder.

1, 2, 3, 6, 11, 22, 33, 66, 1093, 2186, 3279, 6558, 12023, 24046, 36069

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72129 and 72138. The biggest common factor number is the GCF number.
So the greatest common factor 72129 and 72138 is 3.

Also check out the Least Common Multiple of 72129 and 72138