What is the Greatest Common Factor of 21668 and 21678?

Greatest common factor (GCF) of 21668 and 21678 is 2.

GCF(21668,21678) = 2

We will now calculate the prime factors of 21668 and 21678, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21668 and 21678.

How to find the GCF of 21668 and 21678?

We will first find the prime factorization of 21668 and 21678. After we will calculate the factors of 21668 and 21678 and find the biggest common factor number .

Step-1: Prime Factorization of 21668

Prime factors of 21668 are 2, 5417. Prime factorization of 21668 in exponential form is:

21668 = 2² × 5417¹

Step-2: Prime Factorization of 21678

Prime factors of 21678 are 2, 3, 3613. Prime factorization of 21678 in exponential form is:

21678 = 2¹ × 3¹ × 3613¹

Step-3: Factors of 21668

List of positive integer factors of 21668 that divides 21668 without a remainder.

1, 2, 4, 5417, 10834

Step-4: Factors of 21678

List of positive integer factors of 21678 that divides 21668 without a remainder.

1, 2, 3, 6, 3613, 7226, 10839

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21668 and 21678. The biggest common factor number is the GCF number.
So the greatest common factor 21668 and 21678 is 2.

Also check out the Least Common Multiple of 21668 and 21678