What is the Greatest Common Factor of 21986 and 21994?

Greatest common factor (GCF) of 21986 and 21994 is 2.

GCF(21986,21994) = 2

We will now calculate the prime factors of 21986 and 21994, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21986 and 21994.

How to find the GCF of 21986 and 21994?

We will first find the prime factorization of 21986 and 21994. After we will calculate the factors of 21986 and 21994 and find the biggest common factor number .

Step-1: Prime Factorization of 21986

Prime factors of 21986 are 2, 10993. Prime factorization of 21986 in exponential form is:

21986 = 2¹ × 10993¹

Step-2: Prime Factorization of 21994

Prime factors of 21994 are 2, 7, 1571. Prime factorization of 21994 in exponential form is:

21994 = 2¹ × 7¹ × 1571¹

Step-3: Factors of 21986

List of positive integer factors of 21986 that divides 21986 without a remainder.

1, 2, 10993

Step-4: Factors of 21994

List of positive integer factors of 21994 that divides 21986 without a remainder.

1, 2, 7, 14, 1571, 3142, 10997

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21986 and 21994. The biggest common factor number is the GCF number.
So the greatest common factor 21986 and 21994 is 2.

Also check out the Least Common Multiple of 21986 and 21994