What is the Greatest Common Factor of 21777 and 21792?

Greatest common factor (GCF) of 21777 and 21792 is 3.

GCF(21777,21792) = 3

We will now calculate the prime factors of 21777 and 21792, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21777 and 21792.

How to find the GCF of 21777 and 21792?

We will first find the prime factorization of 21777 and 21792. After we will calculate the factors of 21777 and 21792 and find the biggest common factor number .

Step-1: Prime Factorization of 21777

Prime factors of 21777 are 3, 7, 17, 61. Prime factorization of 21777 in exponential form is:

21777 = 3¹ × 7¹ × 17¹ × 61¹

Step-2: Prime Factorization of 21792

Prime factors of 21792 are 2, 3, 227. Prime factorization of 21792 in exponential form is:

21792 = 2⁵ × 3¹ × 227¹

Step-3: Factors of 21777

List of positive integer factors of 21777 that divides 21777 without a remainder.

1, 3, 7, 17, 21, 51, 61, 119, 183, 357, 427, 1037, 1281, 3111, 7259

Step-4: Factors of 21792

List of positive integer factors of 21792 that divides 21777 without a remainder.

1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96, 227, 454, 681, 908, 1362, 1816, 2724, 3632, 5448, 7264, 10896

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21777 and 21792. The biggest common factor number is the GCF number.
So the greatest common factor 21777 and 21792 is 3.

Also check out the Least Common Multiple of 21777 and 21792