What is the Greatest Common Factor of 20639 and 20643?

Greatest common factor (GCF) of 20639 and 20643 is 1.

GCF(20639,20643) = 1

We will now calculate the prime factors of 20639 and 20643, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20639 and 20643.

How to find the GCF of 20639 and 20643?

We will first find the prime factorization of 20639 and 20643. After we will calculate the factors of 20639 and 20643 and find the biggest common factor number .

Step-1: Prime Factorization of 20639

Prime factors of 20639 are 20639. Prime factorization of 20639 in exponential form is:

20639 = 20639¹

Step-2: Prime Factorization of 20643

Prime factors of 20643 are 3, 7, 983. Prime factorization of 20643 in exponential form is:

20643 = 3¹ × 7¹ × 983¹

Step-3: Factors of 20639

List of positive integer factors of 20639 that divides 20639 without a remainder.

Step-4: Factors of 20643

List of positive integer factors of 20643 that divides 20639 without a remainder.

1, 3, 7, 21, 983, 2949, 6881

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20639 and 20643. The biggest common factor number is the GCF number.
So the greatest common factor 20639 and 20643 is 1.

Also check out the Least Common Multiple of 20639 and 20643