What is the Greatest Common Factor of 21078 and 21086?

Greatest common factor (GCF) of 21078 and 21086 is 2.

GCF(21078,21086) = 2

We will now calculate the prime factors of 21078 and 21086, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21078 and 21086.

How to find the GCF of 21078 and 21086?

We will first find the prime factorization of 21078 and 21086. After we will calculate the factors of 21078 and 21086 and find the biggest common factor number .

Step-1: Prime Factorization of 21078

Prime factors of 21078 are 2, 3, 1171. Prime factorization of 21078 in exponential form is:

21078 = 2¹ × 3² × 1171¹

Step-2: Prime Factorization of 21086

Prime factors of 21086 are 2, 13, 811. Prime factorization of 21086 in exponential form is:

21086 = 2¹ × 13¹ × 811¹

Step-3: Factors of 21078

List of positive integer factors of 21078 that divides 21078 without a remainder.

1, 2, 3, 6, 9, 18, 1171, 2342, 3513, 7026, 10539

Step-4: Factors of 21086

List of positive integer factors of 21086 that divides 21078 without a remainder.

1, 2, 13, 26, 811, 1622, 10543

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21078 and 21086. The biggest common factor number is the GCF number.
So the greatest common factor 21078 and 21086 is 2.

Also check out the Least Common Multiple of 21078 and 21086