What is the Greatest Common Factor of 621 and 629?

Greatest common factor (GCF) of 621 and 629 is 1.

GCF(621,629) = 1

We will now calculate the prime factors of 621 and 629, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 621 and 629.

How to find the GCF of 621 and 629?

We will first find the prime factorization of 621 and 629. After we will calculate the factors of 621 and 629 and find the biggest common factor number .

Step-1: Prime Factorization of 621

Prime factors of 621 are 3, 23. Prime factorization of 621 in exponential form is:

621 = 3³ × 23¹

Step-2: Prime Factorization of 629

Prime factors of 629 are 17, 37. Prime factorization of 629 in exponential form is:

629 = 17¹ × 37¹

Step-3: Factors of 621

List of positive integer factors of 621 that divides 621 without a remainder.

1, 3, 9, 23, 27, 69, 207

Step-4: Factors of 629

List of positive integer factors of 629 that divides 621 without a remainder.

1, 17, 37

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 621 and 629. The biggest common factor number is the GCF number.
So the greatest common factor 621 and 629 is 1.

Also check out the Least Common Multiple of 621 and 629