What is the Greatest Common Factor of 636 and 643?

Greatest common factor (GCF) of 636 and 643 is 1.

GCF(636,643) = 1

We will now calculate the prime factors of 636 and 643, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 636 and 643.

How to find the GCF of 636 and 643?

We will first find the prime factorization of 636 and 643. After we will calculate the factors of 636 and 643 and find the biggest common factor number .

Step-1: Prime Factorization of 636

Prime factors of 636 are 2, 3, 53. Prime factorization of 636 in exponential form is:

636 = 2² × 3¹ × 53¹

Step-2: Prime Factorization of 643

Prime factors of 643 are 643. Prime factorization of 643 in exponential form is:

643 = 643¹

Step-3: Factors of 636

List of positive integer factors of 636 that divides 636 without a remainder.

1, 2, 3, 4, 6, 12, 53, 106, 159, 212, 318

Step-4: Factors of 643

List of positive integer factors of 643 that divides 636 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 636 and 643. The biggest common factor number is the GCF number.
So the greatest common factor 636 and 643 is 1.

Also check out the Least Common Multiple of 636 and 643