What is the Greatest Common Factor of 20800 and 20811?

Greatest common factor (GCF) of 20800 and 20811 is 1.

GCF(20800,20811) = 1

We will now calculate the prime factors of 20800 and 20811, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20800 and 20811.

How to find the GCF of 20800 and 20811?

We will first find the prime factorization of 20800 and 20811. After we will calculate the factors of 20800 and 20811 and find the biggest common factor number .

Step-1: Prime Factorization of 20800

Prime factors of 20800 are 2, 5, 13. Prime factorization of 20800 in exponential form is:

20800 = 2⁶ × 5² × 13¹

Step-2: Prime Factorization of 20811

Prime factors of 20811 are 3, 7, 991. Prime factorization of 20811 in exponential form is:

20811 = 3¹ × 7¹ × 991¹

Step-3: Factors of 20800

List of positive integer factors of 20800 that divides 20800 without a remainder.

1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 130, 160, 200, 208, 260, 320, 325, 400, 416, 520, 650, 800, 832, 1040, 1300, 1600, 2080, 2600, 4160, 5200, 10400

Step-4: Factors of 20811

List of positive integer factors of 20811 that divides 20800 without a remainder.

1, 3, 7, 21, 991, 2973, 6937

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20800 and 20811. The biggest common factor number is the GCF number.
So the greatest common factor 20800 and 20811 is 1.

Also check out the Least Common Multiple of 20800 and 20811