What is the Greatest Common Factor of 612 and 620?

Greatest common factor (GCF) of 612 and 620 is 4.

GCF(612,620) = 4

We will now calculate the prime factors of 612 and 620, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 612 and 620.

How to find the GCF of 612 and 620?

We will first find the prime factorization of 612 and 620. After we will calculate the factors of 612 and 620 and find the biggest common factor number .

Step-1: Prime Factorization of 612

Prime factors of 612 are 2, 3, 17. Prime factorization of 612 in exponential form is:

612 = 2² × 3² × 17¹

Step-2: Prime Factorization of 620

Prime factors of 620 are 2, 5, 31. Prime factorization of 620 in exponential form is:

620 = 2² × 5¹ × 31¹

Step-3: Factors of 612

List of positive integer factors of 612 that divides 612 without a remainder.

1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 68, 102, 153, 204, 306

Step-4: Factors of 620

List of positive integer factors of 620 that divides 612 without a remainder.

1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 612 and 620. The biggest common factor number is the GCF number.
So the greatest common factor 612 and 620 is 4.

Also check out the Least Common Multiple of 612 and 620