What is the Greatest Common Factor of 42708 and 42720?

Greatest common factor (GCF) of 42708 and 42720 is 12.

GCF(42708,42720) = 12

We will now calculate the prime factors of 42708 and 42720, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42708 and 42720.

How to find the GCF of 42708 and 42720?

We will first find the prime factorization of 42708 and 42720. After we will calculate the factors of 42708 and 42720 and find the biggest common factor number .

Step-1: Prime Factorization of 42708

Prime factors of 42708 are 2, 3, 3559. Prime factorization of 42708 in exponential form is:

42708 = 2² × 3¹ × 3559¹

Step-2: 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-3: Factors of 42708

List of positive integer factors of 42708 that divides 42708 without a remainder.

1, 2, 3, 4, 6, 12, 3559, 7118, 10677, 14236, 21354

Step-4: Factors of 42720

List of positive integer factors of 42720 that divides 42708 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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42708 and 42720. The biggest common factor number is the GCF number.
So the greatest common factor 42708 and 42720 is 12.

Also check out the Least Common Multiple of 42708 and 42720