What is the Greatest Common Factor of 28009 and 28020?

Greatest common factor (GCF) of 28009 and 28020 is 1.

GCF(28009,28020) = 1

We will now calculate the prime factors of 28009 and 28020, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28009 and 28020.

How to find the GCF of 28009 and 28020?

We will first find the prime factorization of 28009 and 28020. After we will calculate the factors of 28009 and 28020 and find the biggest common factor number .

Step-1: Prime Factorization of 28009

Prime factors of 28009 are 37, 757. Prime factorization of 28009 in exponential form is:

28009 = 37¹ × 757¹

Step-2: Prime Factorization of 28020

Prime factors of 28020 are 2, 3, 5, 467. Prime factorization of 28020 in exponential form is:

28020 = 2² × 3¹ × 5¹ × 467¹

Step-3: Factors of 28009

List of positive integer factors of 28009 that divides 28009 without a remainder.

1, 37, 757

Step-4: Factors of 28020

List of positive integer factors of 28020 that divides 28009 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 467, 934, 1401, 1868, 2335, 2802, 4670, 5604, 7005, 9340, 14010

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28009 and 28020. The biggest common factor number is the GCF number.
So the greatest common factor 28009 and 28020 is 1.

Also check out the Least Common Multiple of 28009 and 28020