What is the Greatest Common Factor of 42720 and 42740?

Greatest common factor (GCF) of 42720 and 42740 is 20.

GCF(42720,42740) = 20

We will now calculate the prime factors of 42720 and 42740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42720 and 42740.

How to find the GCF of 42720 and 42740?

We will first find the prime factorization of 42720 and 42740. After we will calculate the factors of 42720 and 42740 and find the biggest common factor number .

Step-1: Prime Factorization of 42720

Prime factors of 42720 are 2, 3, 5, 89. Prime factorization of 42720 in exponential form is:

42720 = 2⁵ × 3¹ × 5¹ × 89¹

Step-2: Prime Factorization of 42740

Prime factors of 42740 are 2, 5, 2137. Prime factorization of 42740 in exponential form is:

42740 = 2² × 5¹ × 2137¹

Step-3: Factors of 42720

List of positive integer factors of 42720 that divides 42720 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 89, 96, 120, 160, 178, 240, 267, 356, 445, 480, 534, 712, 890, 1068, 1335, 1424, 1780, 2136, 2670, 2848, 3560, 4272, 5340, 7120, 8544, 10680, 14240, 21360

Step-4: Factors of 42740

List of positive integer factors of 42740 that divides 42720 without a remainder.

1, 2, 4, 5, 10, 20, 2137, 4274, 8548, 10685, 21370

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42720 and 42740. The biggest common factor number is the GCF number.
So the greatest common factor 42720 and 42740 is 20.

Also check out the Least Common Multiple of 42720 and 42740