What is the Greatest Common Factor of 21872 and 21889?

Greatest common factor (GCF) of 21872 and 21889 is 1.

GCF(21872,21889) = 1

We will now calculate the prime factors of 21872 and 21889, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21872 and 21889.

How to find the GCF of 21872 and 21889?

We will first find the prime factorization of 21872 and 21889. After we will calculate the factors of 21872 and 21889 and find the biggest common factor number .

Step-1: Prime Factorization of 21872

Prime factors of 21872 are 2, 1367. Prime factorization of 21872 in exponential form is:

21872 = 2⁴ × 1367¹

Step-2: Prime Factorization of 21889

Prime factors of 21889 are 7, 53, 59. Prime factorization of 21889 in exponential form is:

21889 = 7¹ × 53¹ × 59¹

Step-3: Factors of 21872

List of positive integer factors of 21872 that divides 21872 without a remainder.

1, 2, 4, 8, 16, 1367, 2734, 5468, 10936

Step-4: Factors of 21889

List of positive integer factors of 21889 that divides 21872 without a remainder.

1, 7, 53, 59, 371, 413, 3127

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21872 and 21889. The biggest common factor number is the GCF number.
So the greatest common factor 21872 and 21889 is 1.

Also check out the Least Common Multiple of 21872 and 21889