What is the Greatest Common Factor of 20847 and 20856?

Greatest common factor (GCF) of 20847 and 20856 is 3.

GCF(20847,20856) = 3

We will now calculate the prime factors of 20847 and 20856, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20847 and 20856.

How to find the GCF of 20847 and 20856?

We will first find the prime factorization of 20847 and 20856. After we will calculate the factors of 20847 and 20856 and find the biggest common factor number .

Step-1: Prime Factorization of 20847

Prime factors of 20847 are 3, 6949. Prime factorization of 20847 in exponential form is:

20847 = 3¹ × 6949¹

Step-2: Prime Factorization of 20856

Prime factors of 20856 are 2, 3, 11, 79. Prime factorization of 20856 in exponential form is:

20856 = 2³ × 3¹ × 11¹ × 79¹

Step-3: Factors of 20847

List of positive integer factors of 20847 that divides 20847 without a remainder.

1, 3, 6949

Step-4: Factors of 20856

List of positive integer factors of 20856 that divides 20847 without a remainder.

1, 2, 3, 4, 6, 8, 11, 12, 22, 24, 33, 44, 66, 79, 88, 132, 158, 237, 264, 316, 474, 632, 869, 948, 1738, 1896, 2607, 3476, 5214, 6952, 10428

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20847 and 20856. The biggest common factor number is the GCF number.
So the greatest common factor 20847 and 20856 is 3.

Also check out the Least Common Multiple of 20847 and 20856