What is the Greatest Common Factor of 20680 and 20691?

Greatest common factor (GCF) of 20680 and 20691 is 11.

GCF(20680,20691) = 11

We will now calculate the prime factors of 20680 and 20691, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20680 and 20691.

How to find the GCF of 20680 and 20691?

We will first find the prime factorization of 20680 and 20691. After we will calculate the factors of 20680 and 20691 and find the biggest common factor number .

Step-1: Prime Factorization of 20680

Prime factors of 20680 are 2, 5, 11, 47. Prime factorization of 20680 in exponential form is:

20680 = 2³ × 5¹ × 11¹ × 47¹

Step-2: 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-3: Factors of 20680

List of positive integer factors of 20680 that divides 20680 without a remainder.

1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 1034, 1880, 2068, 2585, 4136, 5170, 10340

Step-4: Factors of 20691

List of positive integer factors of 20691 that divides 20680 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20680 and 20691. The biggest common factor number is the GCF number.
So the greatest common factor 20680 and 20691 is 11.

Also check out the Least Common Multiple of 20680 and 20691