What is the Greatest Common Factor of 631 and 640?

Greatest common factor (GCF) of 631 and 640 is 1.

GCF(631,640) = 1

We will now calculate the prime factors of 631 and 640, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 631 and 640.

How to find the GCF of 631 and 640?

We will first find the prime factorization of 631 and 640. After we will calculate the factors of 631 and 640 and find the biggest common factor number .

Step-1: Prime Factorization of 631

Prime factors of 631 are 631. Prime factorization of 631 in exponential form is:

631 = 631¹

Step-2: Prime Factorization of 640

Prime factors of 640 are 2, 5. Prime factorization of 640 in exponential form is:

640 = 2⁷ × 5¹

Step-3: Factors of 631

List of positive integer factors of 631 that divides 631 without a remainder.

Step-4: Factors of 640

List of positive integer factors of 640 that divides 631 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 631 and 640. The biggest common factor number is the GCF number.
So the greatest common factor 631 and 640 is 1.

Also check out the Least Common Multiple of 631 and 640