What is the Greatest Common Factor of 42540 and 42555?

Greatest common factor (GCF) of 42540 and 42555 is 15.

GCF(42540,42555) = 15

We will now calculate the prime factors of 42540 and 42555, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42540 and 42555.

How to find the GCF of 42540 and 42555?

We will first find the prime factorization of 42540 and 42555. After we will calculate the factors of 42540 and 42555 and find the biggest common factor number .

Step-1: Prime Factorization of 42540

Prime factors of 42540 are 2, 3, 5, 709. Prime factorization of 42540 in exponential form is:

42540 = 2² × 3¹ × 5¹ × 709¹

Step-2: Prime Factorization of 42555

Prime factors of 42555 are 3, 5, 2837. Prime factorization of 42555 in exponential form is:

42555 = 3¹ × 5¹ × 2837¹

Step-3: Factors of 42540

List of positive integer factors of 42540 that divides 42540 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 709, 1418, 2127, 2836, 3545, 4254, 7090, 8508, 10635, 14180, 21270

Step-4: Factors of 42555

List of positive integer factors of 42555 that divides 42540 without a remainder.

1, 3, 5, 15, 2837, 8511, 14185

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42540 and 42555. The biggest common factor number is the GCF number.
So the greatest common factor 42540 and 42555 is 15.

Also check out the Least Common Multiple of 42540 and 42555