What is the Greatest Common Factor of 20451 and 20457?

Greatest common factor (GCF) of 20451 and 20457 is 3.

GCF(20451,20457) = 3

We will now calculate the prime factors of 20451 and 20457, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20451 and 20457.

How to find the GCF of 20451 and 20457?

We will first find the prime factorization of 20451 and 20457. After we will calculate the factors of 20451 and 20457 and find the biggest common factor number .

Step-1: Prime Factorization of 20451

Prime factors of 20451 are 3, 17, 401. Prime factorization of 20451 in exponential form is:

20451 = 3¹ × 17¹ × 401¹

Step-2: Prime Factorization of 20457

Prime factors of 20457 are 3, 2273. Prime factorization of 20457 in exponential form is:

20457 = 3² × 2273¹

Step-3: Factors of 20451

List of positive integer factors of 20451 that divides 20451 without a remainder.

1, 3, 17, 51, 401, 1203, 6817

Step-4: Factors of 20457

List of positive integer factors of 20457 that divides 20451 without a remainder.

1, 3, 9, 2273, 6819

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20451 and 20457. The biggest common factor number is the GCF number.
So the greatest common factor 20451 and 20457 is 3.

Also check out the Least Common Multiple of 20451 and 20457