What is the Greatest Common Factor of 42015 and 42020?

Greatest common factor (GCF) of 42015 and 42020 is 5.

GCF(42015,42020) = 5

We will now calculate the prime factors of 42015 and 42020, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42015 and 42020.

How to find the GCF of 42015 and 42020?

We will first find the prime factorization of 42015 and 42020. After we will calculate the factors of 42015 and 42020 and find the biggest common factor number .

Step-1: Prime Factorization of 42015

Prime factors of 42015 are 3, 5, 2801. Prime factorization of 42015 in exponential form is:

42015 = 3¹ × 5¹ × 2801¹

Step-2: Prime Factorization of 42020

Prime factors of 42020 are 2, 5, 11, 191. Prime factorization of 42020 in exponential form is:

42020 = 2² × 5¹ × 11¹ × 191¹

Step-3: Factors of 42015

List of positive integer factors of 42015 that divides 42015 without a remainder.

1, 3, 5, 15, 2801, 8403, 14005

Step-4: Factors of 42020

List of positive integer factors of 42020 that divides 42015 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 764, 955, 1910, 2101, 3820, 4202, 8404, 10505, 21010

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42015 and 42020. The biggest common factor number is the GCF number.
So the greatest common factor 42015 and 42020 is 5.

Also check out the Least Common Multiple of 42015 and 42020