What is the Greatest Common Factor of 21078 and 21091?

Greatest common factor (GCF) of 21078 and 21091 is 1.

GCF(21078,21091) = 1

We will now calculate the prime factors of 21078 and 21091, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21078 and 21091.

How to find the GCF of 21078 and 21091?

We will first find the prime factorization of 21078 and 21091. After we will calculate the factors of 21078 and 21091 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 21091

Prime factors of 21091 are 7, 23, 131. Prime factorization of 21091 in exponential form is:

21091 = 7¹ × 23¹ × 131¹

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 21091

List of positive integer factors of 21091 that divides 21078 without a remainder.

1, 7, 23, 131, 161, 917, 3013

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21078 and 21091. The biggest common factor number is the GCF number.
So the greatest common factor 21078 and 21091 is 1.

Also check out the Least Common Multiple of 21078 and 21091