What is the Greatest Common Factor of 42555 and 42561?

Greatest common factor (GCF) of 42555 and 42561 is 3.

GCF(42555,42561) = 3

We will now calculate the prime factors of 42555 and 42561, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42555 and 42561.

How to find the GCF of 42555 and 42561?

We will first find the prime factorization of 42555 and 42561. After we will calculate the factors of 42555 and 42561 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 42561

Prime factors of 42561 are 3, 4729. Prime factorization of 42561 in exponential form is:

42561 = 3² × 4729¹

Step-3: Factors of 42555

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

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

Step-4: Factors of 42561

List of positive integer factors of 42561 that divides 42555 without a remainder.

1, 3, 9, 4729, 14187

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42555 and 42561. The biggest common factor number is the GCF number.
So the greatest common factor 42555 and 42561 is 3.

Also check out the Least Common Multiple of 42555 and 42561