What is the Greatest Common Factor of 171 and 190?

Greatest common factor (GCF) of 171 and 190 is 19.

GCF(171,190) = 19

We will now calculate the prime factors of 171 and 190, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 171 and 190.

How to find the GCF of 171 and 190?

We will first find the prime factorization of 171 and 190. After we will calculate the factors of 171 and 190 and find the biggest common factor number .

Step-1: Prime Factorization of 171

Prime factors of 171 are 3, 19. Prime factorization of 171 in exponential form is:

171 = 3² × 19¹

Step-2: Prime Factorization of 190

Prime factors of 190 are 2, 5, 19. Prime factorization of 190 in exponential form is:

190 = 2¹ × 5¹ × 19¹

Step-3: Factors of 171

List of positive integer factors of 171 that divides 171 without a remainder.

1, 3, 9, 19, 57

Step-4: Factors of 190

List of positive integer factors of 190 that divides 171 without a remainder.

1, 2, 5, 10, 19, 38, 95

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 171 and 190. The biggest common factor number is the GCF number.
So the greatest common factor 171 and 190 is 19.

Also check out the Least Common Multiple of 171 and 190