GCF of 8 and 20

What is the GCF of 8 and 20? - The GCF of 8 and 20 is 4. Follow the step by step instructions on how to find the great common factor of 8 and 20.

What is the greatest common factor of 8 and 20?

How to find the gcf of 8 and 20?

To find the gcf of 8 and 20, we first need to find the factors of 8 and 20 and then choose the greatest common factor that are dividable by both 8 and 20.

Factors of 8 = 1, 2, 4, 8
Factors of 20 = 1, 2, 4, 5, 10, 20

The greatest common factor of 8 and 20 is 4, because 4 is the largest number that is divisible by both numbers.

Another method to find the greatest common factor of 8 and 20 is by using the prime factorization method.
To use prime factorization, we first need to find the prime factors of 8 and 20, and then get the GCF by multiplying all the common prime factors from the two sets.

Prime factorization of 8 = 2 x 2 x 2
Prime factorization of 20 = 2 x 2 x 5
Common prime factors = 2 x 2 = 4