What is the Greatest Common Factor of 170 and 190?

Greatest common factor (GCF) of 170 and 190 is 10.

GCF(170,190) = 10

We will now calculate the prime factors of 170 and 190, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 170 and 190.

How to find the GCF of 170 and 190?

We will first find the prime factorization of 170 and 190. After we will calculate the factors of 170 and 190 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 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 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 190

List of positive integer factors of 190 that divides 170 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 170 and 190. The biggest common factor number is the GCF number.
So the greatest common factor 170 and 190 is 10.

Also check out the Least Common Multiple of 170 and 190