What is the Greatest Common Factor of 2157 and 2172?

Greatest common factor (GCF) of 2157 and 2172 is 3.

GCF(2157,2172) = 3

We will now calculate the prime factors of 2157 and 2172, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2157 and 2172.

How to find the GCF of 2157 and 2172?

We will first find the prime factorization of 2157 and 2172. After we will calculate the factors of 2157 and 2172 and find the biggest common factor number .

Step-1: Prime Factorization of 2157

Prime factors of 2157 are 3, 719. Prime factorization of 2157 in exponential form is:

2157 = 3¹ × 719¹

Step-2: Prime Factorization of 2172

Prime factors of 2172 are 2, 3, 181. Prime factorization of 2172 in exponential form is:

2172 = 2² × 3¹ × 181¹

Step-3: Factors of 2157

List of positive integer factors of 2157 that divides 2157 without a remainder.

1, 3, 719

Step-4: Factors of 2172

List of positive integer factors of 2172 that divides 2157 without a remainder.

1, 2, 3, 4, 6, 12, 181, 362, 543, 724, 1086

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2157 and 2172. The biggest common factor number is the GCF number.
So the greatest common factor 2157 and 2172 is 3.

Also check out the Least Common Multiple of 2157 and 2172