What is the Greatest Common Factor of 20139 and 20157?

Greatest common factor (GCF) of 20139 and 20157 is 3.

GCF(20139,20157) = 3

We will now calculate the prime factors of 20139 and 20157, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20139 and 20157.

How to find the GCF of 20139 and 20157?

We will first find the prime factorization of 20139 and 20157. After we will calculate the factors of 20139 and 20157 and find the biggest common factor number .

Step-1: Prime Factorization of 20139

Prime factors of 20139 are 3, 7, 137. Prime factorization of 20139 in exponential form is:

20139 = 3¹ × 7² × 137¹

Step-2: Prime Factorization of 20157

Prime factors of 20157 are 3, 6719. Prime factorization of 20157 in exponential form is:

20157 = 3¹ × 6719¹

Step-3: Factors of 20139

List of positive integer factors of 20139 that divides 20139 without a remainder.

1, 3, 7, 21, 49, 137, 147, 411, 959, 2877, 6713

Step-4: Factors of 20157

List of positive integer factors of 20157 that divides 20139 without a remainder.

1, 3, 6719

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20139 and 20157. The biggest common factor number is the GCF number.
So the greatest common factor 20139 and 20157 is 3.

Also check out the Least Common Multiple of 20139 and 20157