What is the Greatest Common Factor of 161 and 171?

Greatest common factor (GCF) of 161 and 171 is 1.

GCF(161,171) = 1

We will now calculate the prime factors of 161 and 171, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 161 and 171.

How to find the GCF of 161 and 171?

We will first find the prime factorization of 161 and 171. After we will calculate the factors of 161 and 171 and find the biggest common factor number .

Step-1: Prime Factorization of 161

Prime factors of 161 are 7, 23. Prime factorization of 161 in exponential form is:

161 = 7¹ × 23¹

Step-2: Prime Factorization of 171

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

171 = 3² × 19¹

Step-3: Factors of 161

List of positive integer factors of 161 that divides 161 without a remainder.

1, 7, 23

Step-4: Factors of 171

List of positive integer factors of 171 that divides 161 without a remainder.

1, 3, 9, 19, 57

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 161 and 171. The biggest common factor number is the GCF number.
So the greatest common factor 161 and 171 is 1.

Also check out the Least Common Multiple of 161 and 171