What is the Greatest Common Factor of 28139 and 28158?

Greatest common factor (GCF) of 28139 and 28158 is 19.

GCF(28139,28158) = 19

We will now calculate the prime factors of 28139 and 28158, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28139 and 28158.

How to find the GCF of 28139 and 28158?

We will first find the prime factorization of 28139 and 28158. After we will calculate the factors of 28139 and 28158 and find the biggest common factor number .

Step-1: Prime Factorization of 28139

Prime factors of 28139 are 19, 1481. Prime factorization of 28139 in exponential form is:

28139 = 19¹ × 1481¹

Step-2: Prime Factorization of 28158

Prime factors of 28158 are 2, 3, 13, 19. Prime factorization of 28158 in exponential form is:

28158 = 2¹ × 3¹ × 13¹ × 19²

Step-3: Factors of 28139

List of positive integer factors of 28139 that divides 28139 without a remainder.

1, 19, 1481

Step-4: Factors of 28158

List of positive integer factors of 28158 that divides 28139 without a remainder.

1, 2, 3, 6, 13, 19, 26, 38, 39, 57, 78, 114, 247, 361, 494, 722, 741, 1083, 1482, 2166, 4693, 9386, 14079

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28139 and 28158. The biggest common factor number is the GCF number.
So the greatest common factor 28139 and 28158 is 19.

Also check out the Least Common Multiple of 28139 and 28158