What is the Greatest Common Factor of 21020 and 21025?

Greatest common factor (GCF) of 21020 and 21025 is 5.

GCF(21020,21025) = 5

We will now calculate the prime factors of 21020 and 21025, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21020 and 21025.

How to find the GCF of 21020 and 21025?

We will first find the prime factorization of 21020 and 21025. After we will calculate the factors of 21020 and 21025 and find the biggest common factor number .

Step-1: Prime Factorization of 21020

Prime factors of 21020 are 2, 5, 1051. Prime factorization of 21020 in exponential form is:

21020 = 2² × 5¹ × 1051¹

Step-2: Prime Factorization of 21025

Prime factors of 21025 are 5, 29. Prime factorization of 21025 in exponential form is:

21025 = 5² × 29²

Step-3: Factors of 21020

List of positive integer factors of 21020 that divides 21020 without a remainder.

1, 2, 4, 5, 10, 20, 1051, 2102, 4204, 5255, 10510

Step-4: Factors of 21025

List of positive integer factors of 21025 that divides 21020 without a remainder.

1, 5, 25, 29, 145, 725, 841, 4205

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21020 and 21025. The biggest common factor number is the GCF number.
So the greatest common factor 21020 and 21025 is 5.

Also check out the Least Common Multiple of 21020 and 21025