What is the Greatest Common Factor of 21940 and 21952?

Greatest common factor (GCF) of 21940 and 21952 is 4.

GCF(21940,21952) = 4

We will now calculate the prime factors of 21940 and 21952, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21940 and 21952.

How to find the GCF of 21940 and 21952?

We will first find the prime factorization of 21940 and 21952. After we will calculate the factors of 21940 and 21952 and find the biggest common factor number .

Step-1: Prime Factorization of 21940

Prime factors of 21940 are 2, 5, 1097. Prime factorization of 21940 in exponential form is:

21940 = 2² × 5¹ × 1097¹

Step-2: Prime Factorization of 21952

Prime factors of 21952 are 2, 7. Prime factorization of 21952 in exponential form is:

21952 = 2⁶ × 7³

Step-3: Factors of 21940

List of positive integer factors of 21940 that divides 21940 without a remainder.

1, 2, 4, 5, 10, 20, 1097, 2194, 4388, 5485, 10970

Step-4: Factors of 21952

List of positive integer factors of 21952 that divides 21940 without a remainder.

1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 196, 224, 343, 392, 448, 686, 784, 1372, 1568, 2744, 3136, 5488, 10976

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21940 and 21952. The biggest common factor number is the GCF number.
So the greatest common factor 21940 and 21952 is 4.

Also check out the Least Common Multiple of 21940 and 21952