What is the Greatest Common Factor of 2156 and 2170?

Greatest common factor (GCF) of 2156 and 2170 is 14.

GCF(2156,2170) = 14

We will now calculate the prime factors of 2156 and 2170, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2156 and 2170.

How to find the GCF of 2156 and 2170?

We will first find the prime factorization of 2156 and 2170. After we will calculate the factors of 2156 and 2170 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 2170

Prime factors of 2170 are 2, 5, 7, 31. Prime factorization of 2170 in exponential form is:

2170 = 2¹ × 5¹ × 7¹ × 31¹

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 2170

List of positive integer factors of 2170 that divides 2156 without a remainder.

1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 155, 217, 310, 434, 1085

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2156 and 2170. The biggest common factor number is the GCF number.
So the greatest common factor 2156 and 2170 is 14.

Also check out the Least Common Multiple of 2156 and 2170