What is the Greatest Common Factor of 20787 and 20800?

Greatest common factor (GCF) of 20787 and 20800 is 13.

GCF(20787,20800) = 13

We will now calculate the prime factors of 20787 and 20800, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20787 and 20800.

How to find the GCF of 20787 and 20800?

We will first find the prime factorization of 20787 and 20800. After we will calculate the factors of 20787 and 20800 and find the biggest common factor number .

Step-1: Prime Factorization of 20787

Prime factors of 20787 are 3, 13, 41. Prime factorization of 20787 in exponential form is:

20787 = 3¹ × 13² × 41¹

Step-2: 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-3: Factors of 20787

List of positive integer factors of 20787 that divides 20787 without a remainder.

1, 3, 13, 39, 41, 123, 169, 507, 533, 1599, 6929

Step-4: Factors of 20800

List of positive integer factors of 20800 that divides 20787 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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20787 and 20800. The biggest common factor number is the GCF number.
So the greatest common factor 20787 and 20800 is 13.

Also check out the Least Common Multiple of 20787 and 20800