What is the Greatest Common Factor of 20009 and 20021?

Greatest common factor (GCF) of 20009 and 20021 is 1.

GCF(20009,20021) = 1

We will now calculate the prime factors of 20009 and 20021, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20009 and 20021.

How to find the GCF of 20009 and 20021?

We will first find the prime factorization of 20009 and 20021. After we will calculate the factors of 20009 and 20021 and find the biggest common factor number .

Step-1: Prime Factorization of 20009

Prime factors of 20009 are 11, 17, 107. Prime factorization of 20009 in exponential form is:

20009 = 11¹ × 17¹ × 107¹

Step-2: Prime Factorization of 20021

Prime factors of 20021 are 20021. Prime factorization of 20021 in exponential form is:

20021 = 20021¹

Step-3: Factors of 20009

List of positive integer factors of 20009 that divides 20009 without a remainder.

1, 11, 17, 107, 187, 1177, 1819

Step-4: Factors of 20021

List of positive integer factors of 20021 that divides 20009 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20009 and 20021. The biggest common factor number is the GCF number.
So the greatest common factor 20009 and 20021 is 1.

Also check out the Least Common Multiple of 20009 and 20021