What is the Greatest Common Factor of 21861 and 21877?

Greatest common factor (GCF) of 21861 and 21877 is 1.

GCF(21861,21877) = 1

We will now calculate the prime factors of 21861 and 21877, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21861 and 21877.

How to find the GCF of 21861 and 21877?

We will first find the prime factorization of 21861 and 21877. After we will calculate the factors of 21861 and 21877 and find the biggest common factor number .

Step-1: Prime Factorization of 21861

Prime factors of 21861 are 3, 7, 347. Prime factorization of 21861 in exponential form is:

21861 = 3² × 7¹ × 347¹

Step-2: Prime Factorization of 21877

Prime factors of 21877 are 131, 167. Prime factorization of 21877 in exponential form is:

21877 = 131¹ × 167¹

Step-3: Factors of 21861

List of positive integer factors of 21861 that divides 21861 without a remainder.

1, 3, 7, 9, 21, 63, 347, 1041, 2429, 3123, 7287

Step-4: Factors of 21877

List of positive integer factors of 21877 that divides 21861 without a remainder.

1, 131, 167

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21861 and 21877. The biggest common factor number is the GCF number.
So the greatest common factor 21861 and 21877 is 1.

Also check out the Least Common Multiple of 21861 and 21877