What is the Greatest Common Factor of 120 and 124?

Greatest common factor (GCF) of 120 and 124 is 4.

GCF(120,124) = 4

We will now calculate the prime factors of 120 and 124, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 120 and 124.

How to find the GCF of 120 and 124?

We will first find the prime factorization of 120 and 124. After we will calculate the factors of 120 and 124 and find the biggest common factor number .

Step-1: Prime Factorization of 120

Prime factors of 120 are 2, 3, 5. Prime factorization of 120 in exponential form is:

120 = 2³ × 3¹ × 5¹

Step-2: Prime Factorization of 124

Prime factors of 124 are 2, 31. Prime factorization of 124 in exponential form is:

124 = 2² × 31¹

Step-3: Factors of 120

List of positive integer factors of 120 that divides 120 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60

Step-4: Factors of 124

List of positive integer factors of 124 that divides 120 without a remainder.

1, 2, 4, 31, 62

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 120 and 124. The biggest common factor number is the GCF number.
So the greatest common factor 120 and 124 is 4.

Also check out the Least Common Multiple of 120 and 124