What is the Greatest Common Factor of 21878 and 21884?

Greatest common factor (GCF) of 21878 and 21884 is 2.

GCF(21878,21884) = 2

We will now calculate the prime factors of 21878 and 21884, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21878 and 21884.

How to find the GCF of 21878 and 21884?

We will first find the prime factorization of 21878 and 21884. After we will calculate the factors of 21878 and 21884 and find the biggest common factor number .

Step-1: Prime Factorization of 21878

Prime factors of 21878 are 2, 10939. Prime factorization of 21878 in exponential form is:

21878 = 2¹ × 10939¹

Step-2: Prime Factorization of 21884

Prime factors of 21884 are 2, 5471. Prime factorization of 21884 in exponential form is:

21884 = 2² × 5471¹

Step-3: Factors of 21878

List of positive integer factors of 21878 that divides 21878 without a remainder.

1, 2, 10939

Step-4: Factors of 21884

List of positive integer factors of 21884 that divides 21878 without a remainder.

1, 2, 4, 5471, 10942

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21878 and 21884. The biggest common factor number is the GCF number.
So the greatest common factor 21878 and 21884 is 2.

Also check out the Least Common Multiple of 21878 and 21884