What is the Greatest Common Factor of 20896 and 20916?

Greatest common factor (GCF) of 20896 and 20916 is 4.

GCF(20896,20916) = 4

We will now calculate the prime factors of 20896 and 20916, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20896 and 20916.

How to find the GCF of 20896 and 20916?

We will first find the prime factorization of 20896 and 20916. After we will calculate the factors of 20896 and 20916 and find the biggest common factor number .

Step-1: Prime Factorization of 20896

Prime factors of 20896 are 2, 653. Prime factorization of 20896 in exponential form is:

20896 = 2⁵ × 653¹

Step-2: 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-3: Factors of 20896

List of positive integer factors of 20896 that divides 20896 without a remainder.

1, 2, 4, 8, 16, 32, 653, 1306, 2612, 5224, 10448

Step-4: Factors of 20916

List of positive integer factors of 20916 that divides 20896 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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20896 and 20916. The biggest common factor number is the GCF number.
So the greatest common factor 20896 and 20916 is 4.

Also check out the Least Common Multiple of 20896 and 20916