What is the Greatest Common Factor of 620 and 624?

Greatest common factor (GCF) of 620 and 624 is 4.

GCF(620,624) = 4

We will now calculate the prime factors of 620 and 624, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 620 and 624.

How to find the GCF of 620 and 624?

We will first find the prime factorization of 620 and 624. After we will calculate the factors of 620 and 624 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 624

Prime factors of 624 are 2, 3, 13. Prime factorization of 624 in exponential form is:

624 = 2⁴ × 3¹ × 13¹

Step-3: Factors of 620

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

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

Step-4: Factors of 624

List of positive integer factors of 624 that divides 620 without a remainder.

1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 156, 208, 312

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 620 and 624. The biggest common factor number is the GCF number.
So the greatest common factor 620 and 624 is 4.

Also check out the Least Common Multiple of 620 and 624