What is the Greatest Common Factor of 20491 and 20502?

Greatest common factor (GCF) of 20491 and 20502 is 1.

GCF(20491,20502) = 1

We will now calculate the prime factors of 20491 and 20502, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20491 and 20502.

How to find the GCF of 20491 and 20502?

We will first find the prime factorization of 20491 and 20502. After we will calculate the factors of 20491 and 20502 and find the biggest common factor number .

Step-1: Prime Factorization of 20491

Prime factors of 20491 are 31, 661. Prime factorization of 20491 in exponential form is:

20491 = 31¹ × 661¹

Step-2: Prime Factorization of 20502

Prime factors of 20502 are 2, 3, 17, 67. Prime factorization of 20502 in exponential form is:

20502 = 2¹ × 3² × 17¹ × 67¹

Step-3: Factors of 20491

List of positive integer factors of 20491 that divides 20491 without a remainder.

1, 31, 661

Step-4: Factors of 20502

List of positive integer factors of 20502 that divides 20491 without a remainder.

1, 2, 3, 6, 9, 17, 18, 34, 51, 67, 102, 134, 153, 201, 306, 402, 603, 1139, 1206, 2278, 3417, 6834, 10251

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20491 and 20502. The biggest common factor number is the GCF number.
So the greatest common factor 20491 and 20502 is 1.

Also check out the Least Common Multiple of 20491 and 20502