What is the Greatest Common Factor of 21878 and 21888?

Greatest common factor (GCF) of 21878 and 21888 is 2.

GCF(21878,21888) = 2

We will now calculate the prime factors of 21878 and 21888, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21878 and 21888.

How to find the GCF of 21878 and 21888?

We will first find the prime factorization of 21878 and 21888. After we will calculate the factors of 21878 and 21888 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 21888

Prime factors of 21888 are 2, 3, 19. Prime factorization of 21888 in exponential form is:

21888 = 2⁷ × 3² × 19¹

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 21888

List of positive integer factors of 21888 that divides 21878 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 19, 24, 32, 36, 38, 48, 57, 64, 72, 76, 96, 114, 128, 144, 152, 171, 192, 228, 288, 304, 342, 384, 456, 576, 608, 684, 912, 1152, 1216, 1368, 1824, 2432, 2736, 3648, 5472, 7296, 10944

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21878 and 21888. The biggest common factor number is the GCF number.
So the greatest common factor 21878 and 21888 is 2.

Also check out the Least Common Multiple of 21878 and 21888