What is the Greatest Common Factor of 21091 and 21098?

Greatest common factor (GCF) of 21091 and 21098 is 7.

GCF(21091,21098) = 7

We will now calculate the prime factors of 21091 and 21098, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21091 and 21098.

How to find the GCF of 21091 and 21098?

We will first find the prime factorization of 21091 and 21098. After we will calculate the factors of 21091 and 21098 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 21098

Prime factors of 21098 are 2, 7, 11, 137. Prime factorization of 21098 in exponential form is:

21098 = 2¹ × 7¹ × 11¹ × 137¹

Step-3: Factors of 21091

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

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

Step-4: Factors of 21098

List of positive integer factors of 21098 that divides 21091 without a remainder.

1, 2, 7, 11, 14, 22, 77, 137, 154, 274, 959, 1507, 1918, 3014, 10549

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21091 and 21098. The biggest common factor number is the GCF number.
So the greatest common factor 21091 and 21098 is 7.

Also check out the Least Common Multiple of 21091 and 21098