What is the Greatest Common Factor of 42156 and 42172?

Greatest common factor (GCF) of 42156 and 42172 is 4.

GCF(42156,42172) = 4

We will now calculate the prime factors of 42156 and 42172, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42156 and 42172.

How to find the GCF of 42156 and 42172?

We will first find the prime factorization of 42156 and 42172. After we will calculate the factors of 42156 and 42172 and find the biggest common factor number .

Step-1: Prime Factorization of 42156

Prime factors of 42156 are 2, 3, 1171. Prime factorization of 42156 in exponential form is:

42156 = 2² × 3² × 1171¹

Step-2: Prime Factorization of 42172

Prime factors of 42172 are 2, 13, 811. Prime factorization of 42172 in exponential form is:

42172 = 2² × 13¹ × 811¹

Step-3: Factors of 42156

List of positive integer factors of 42156 that divides 42156 without a remainder.

1, 2, 3, 4, 6, 9, 12, 18, 36, 1171, 2342, 3513, 4684, 7026, 10539, 14052, 21078

Step-4: Factors of 42172

List of positive integer factors of 42172 that divides 42156 without a remainder.

1, 2, 4, 13, 26, 52, 811, 1622, 3244, 10543, 21086

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42156 and 42172. The biggest common factor number is the GCF number.
So the greatest common factor 42156 and 42172 is 4.

Also check out the Least Common Multiple of 42156 and 42172