What is the Greatest Common Factor of 21771 and 21779?

Greatest common factor (GCF) of 21771 and 21779 is 1.

GCF(21771,21779) = 1

We will now calculate the prime factors of 21771 and 21779, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21771 and 21779.

How to find the GCF of 21771 and 21779?

We will first find the prime factorization of 21771 and 21779. After we will calculate the factors of 21771 and 21779 and find the biggest common factor number .

Step-1: Prime Factorization of 21771

Prime factors of 21771 are 3, 41, 59. Prime factorization of 21771 in exponential form is:

21771 = 3² × 41¹ × 59¹

Step-2: Prime Factorization of 21779

Prime factors of 21779 are 29, 751. Prime factorization of 21779 in exponential form is:

21779 = 29¹ × 751¹

Step-3: Factors of 21771

List of positive integer factors of 21771 that divides 21771 without a remainder.

1, 3, 9, 41, 59, 123, 177, 369, 531, 2419, 7257

Step-4: Factors of 21779

List of positive integer factors of 21779 that divides 21771 without a remainder.

1, 29, 751

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21771 and 21779. The biggest common factor number is the GCF number.
So the greatest common factor 21771 and 21779 is 1.

Also check out the Least Common Multiple of 21771 and 21779