What is the Greatest Common Factor of 20691 and 20704?

Greatest common factor (GCF) of 20691 and 20704 is 1.

GCF(20691,20704) = 1

We will now calculate the prime factors of 20691 and 20704, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20691 and 20704.

How to find the GCF of 20691 and 20704?

We will first find the prime factorization of 20691 and 20704. After we will calculate the factors of 20691 and 20704 and find the biggest common factor number .

Step-1: Prime Factorization of 20691

Prime factors of 20691 are 3, 11, 19. Prime factorization of 20691 in exponential form is:

20691 = 3² × 11² × 19¹

Step-2: Prime Factorization of 20704

Prime factors of 20704 are 2, 647. Prime factorization of 20704 in exponential form is:

20704 = 2⁵ × 647¹

Step-3: Factors of 20691

List of positive integer factors of 20691 that divides 20691 without a remainder.

1, 3, 9, 11, 19, 33, 57, 99, 121, 171, 209, 363, 627, 1089, 1881, 2299, 6897

Step-4: Factors of 20704

List of positive integer factors of 20704 that divides 20691 without a remainder.

1, 2, 4, 8, 16, 32, 647, 1294, 2588, 5176, 10352

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20691 and 20704. The biggest common factor number is the GCF number.
So the greatest common factor 20691 and 20704 is 1.

Also check out the Least Common Multiple of 20691 and 20704