What is the Greatest Common Factor of 20157 and 20172?

Greatest common factor (GCF) of 20157 and 20172 is 3.

GCF(20157,20172) = 3

We will now calculate the prime factors of 20157 and 20172, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20157 and 20172.

How to find the GCF of 20157 and 20172?

We will first find the prime factorization of 20157 and 20172. After we will calculate the factors of 20157 and 20172 and find the biggest common factor number .

Step-1: Prime Factorization of 20157

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

20157 = 3¹ × 6719¹

Step-2: Prime Factorization of 20172

Prime factors of 20172 are 2, 3, 41. Prime factorization of 20172 in exponential form is:

20172 = 2² × 3¹ × 41²

Step-3: Factors of 20157

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

1, 3, 6719

Step-4: Factors of 20172

List of positive integer factors of 20172 that divides 20157 without a remainder.

1, 2, 3, 4, 6, 12, 41, 82, 123, 164, 246, 492, 1681, 3362, 5043, 6724, 10086

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20157 and 20172. The biggest common factor number is the GCF number.
So the greatest common factor 20157 and 20172 is 3.

Also check out the Least Common Multiple of 20157 and 20172