What is the Greatest Common Factor of 2156 and 2172?

Greatest common factor (GCF) of 2156 and 2172 is 4.

GCF(2156,2172) = 4

We will now calculate the prime factors of 2156 and 2172, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2156 and 2172.

How to find the GCF of 2156 and 2172?

We will first find the prime factorization of 2156 and 2172. After we will calculate the factors of 2156 and 2172 and find the biggest common factor number .

Step-1: Prime Factorization of 2156

Prime factors of 2156 are 2, 7, 11. Prime factorization of 2156 in exponential form is:

2156 = 2² × 7² × 11¹

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 2156

List of positive integer factors of 2156 that divides 2156 without a remainder.

1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 308, 539, 1078

Step-4: Factors of 2172

List of positive integer factors of 2172 that divides 2156 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 2156 and 2172. The biggest common factor number is the GCF number.
So the greatest common factor 2156 and 2172 is 4.

Also check out the Least Common Multiple of 2156 and 2172