What is the Greatest Common Factor of 42605 and 42620?

Greatest common factor (GCF) of 42605 and 42620 is 5.

GCF(42605,42620) = 5

We will now calculate the prime factors of 42605 and 42620, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42605 and 42620.

How to find the GCF of 42605 and 42620?

We will first find the prime factorization of 42605 and 42620. After we will calculate the factors of 42605 and 42620 and find the biggest common factor number .

Step-1: Prime Factorization of 42605

Prime factors of 42605 are 5, 8521. Prime factorization of 42605 in exponential form is:

42605 = 5¹ × 8521¹

Step-2: Prime Factorization of 42620

Prime factors of 42620 are 2, 5, 2131. Prime factorization of 42620 in exponential form is:

42620 = 2² × 5¹ × 2131¹

Step-3: Factors of 42605

List of positive integer factors of 42605 that divides 42605 without a remainder.

1, 5, 8521

Step-4: Factors of 42620

List of positive integer factors of 42620 that divides 42605 without a remainder.

1, 2, 4, 5, 10, 20, 2131, 4262, 8524, 10655, 21310

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42605 and 42620. The biggest common factor number is the GCF number.
So the greatest common factor 42605 and 42620 is 5.

Also check out the Least Common Multiple of 42605 and 42620