What is the Greatest Common Factor of 3920 and 3925?

Greatest common factor (GCF) of 3920 and 3925 is 5.

GCF(3920,3925) = 5

We will now calculate the prime factors of 3920 and 3925, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3920 and 3925.

How to find the GCF of 3920 and 3925?

We will first find the prime factorization of 3920 and 3925. After we will calculate the factors of 3920 and 3925 and find the biggest common factor number .

Step-1: Prime Factorization of 3920

Prime factors of 3920 are 2, 5, 7. Prime factorization of 3920 in exponential form is:

3920 = 2⁴ × 5¹ × 7²

Step-2: Prime Factorization of 3925

Prime factors of 3925 are 5, 157. Prime factorization of 3925 in exponential form is:

3925 = 5² × 157¹

Step-3: Factors of 3920

List of positive integer factors of 3920 that divides 3920 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960

Step-4: Factors of 3925

List of positive integer factors of 3925 that divides 3920 without a remainder.

1, 5, 25, 157, 785

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3920 and 3925. The biggest common factor number is the GCF number.
So the greatest common factor 3920 and 3925 is 5.

Also check out the Least Common Multiple of 3920 and 3925