What is the Greatest Common Factor of 155 and 164?

Greatest common factor (GCF) of 155 and 164 is 1.

GCF(155,164) = 1

We will now calculate the prime factors of 155 and 164, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 155 and 164.

How to find the GCF of 155 and 164?

We will first find the prime factorization of 155 and 164. After we will calculate the factors of 155 and 164 and find the biggest common factor number .

Step-1: Prime Factorization of 155

Prime factors of 155 are 5, 31. Prime factorization of 155 in exponential form is:

155 = 5¹ × 31¹

Step-2: Prime Factorization of 164

Prime factors of 164 are 2, 41. Prime factorization of 164 in exponential form is:

164 = 2² × 41¹

Step-3: Factors of 155

List of positive integer factors of 155 that divides 155 without a remainder.

1, 5, 31

Step-4: Factors of 164

List of positive integer factors of 164 that divides 155 without a remainder.

1, 2, 4, 41, 82

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 155 and 164. The biggest common factor number is the GCF number.
So the greatest common factor 155 and 164 is 1.

Also check out the Least Common Multiple of 155 and 164