What is the Greatest Common Factor of 170 and 188?

Greatest common factor (GCF) of 170 and 188 is 2.

GCF(170,188) = 2

We will now calculate the prime factors of 170 and 188, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 170 and 188.

How to find the GCF of 170 and 188?

We will first find the prime factorization of 170 and 188. After we will calculate the factors of 170 and 188 and find the biggest common factor number .

Step-1: Prime Factorization of 170

Prime factors of 170 are 2, 5, 17. Prime factorization of 170 in exponential form is:

170 = 2¹ × 5¹ × 17¹

Step-2: Prime Factorization of 188

Prime factors of 188 are 2, 47. Prime factorization of 188 in exponential form is:

188 = 2² × 47¹

Step-3: Factors of 170

List of positive integer factors of 170 that divides 170 without a remainder.

1, 2, 5, 10, 17, 34, 85

Step-4: Factors of 188

List of positive integer factors of 188 that divides 170 without a remainder.

1, 2, 4, 47, 94

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 170 and 188. The biggest common factor number is the GCF number.
So the greatest common factor 170 and 188 is 2.

Also check out the Least Common Multiple of 170 and 188