What is the Greatest Common Factor of 20645 and 20653?

Greatest common factor (GCF) of 20645 and 20653 is 1.

GCF(20645,20653) = 1

We will now calculate the prime factors of 20645 and 20653, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20645 and 20653.

How to find the GCF of 20645 and 20653?

We will first find the prime factorization of 20645 and 20653. After we will calculate the factors of 20645 and 20653 and find the biggest common factor number .

Step-1: Prime Factorization of 20645

Prime factors of 20645 are 5, 4129. Prime factorization of 20645 in exponential form is:

20645 = 5¹ × 4129¹

Step-2: Prime Factorization of 20653

Prime factors of 20653 are 19, 1087. Prime factorization of 20653 in exponential form is:

20653 = 19¹ × 1087¹

Step-3: Factors of 20645

List of positive integer factors of 20645 that divides 20645 without a remainder.

1, 5, 4129

Step-4: Factors of 20653

List of positive integer factors of 20653 that divides 20645 without a remainder.

1, 19, 1087

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20645 and 20653. The biggest common factor number is the GCF number.
So the greatest common factor 20645 and 20653 is 1.

Also check out the Least Common Multiple of 20645 and 20653