What is the Greatest Common Factor of 20916 and 20921?

Greatest common factor (GCF) of 20916 and 20921 is 1.

GCF(20916,20921) = 1

We will now calculate the prime factors of 20916 and 20921, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20916 and 20921.

How to find the GCF of 20916 and 20921?

We will first find the prime factorization of 20916 and 20921. After we will calculate the factors of 20916 and 20921 and find the biggest common factor number .

Step-1: Prime Factorization of 20916

Prime factors of 20916 are 2, 3, 7, 83. Prime factorization of 20916 in exponential form is:

20916 = 2² × 3² × 7¹ × 83¹

Step-2: Prime Factorization of 20921

Prime factors of 20921 are 20921. Prime factorization of 20921 in exponential form is:

20921 = 20921¹

Step-3: Factors of 20916

List of positive integer factors of 20916 that divides 20916 without a remainder.

1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 83, 84, 126, 166, 249, 252, 332, 498, 581, 747, 996, 1162, 1494, 1743, 2324, 2988, 3486, 5229, 6972, 10458

Step-4: Factors of 20921

List of positive integer factors of 20921 that divides 20916 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20916 and 20921. The biggest common factor number is the GCF number.
So the greatest common factor 20916 and 20921 is 1.

Also check out the Least Common Multiple of 20916 and 20921