What is the Greatest Common Factor of 21511 and 21519?

Greatest common factor (GCF) of 21511 and 21519 is 1.

GCF(21511,21519) = 1

We will now calculate the prime factors of 21511 and 21519, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21511 and 21519.

How to find the GCF of 21511 and 21519?

We will first find the prime factorization of 21511 and 21519. After we will calculate the factors of 21511 and 21519 and find the biggest common factor number .

Step-1: Prime Factorization of 21511

Prime factors of 21511 are 7, 439. Prime factorization of 21511 in exponential form is:

21511 = 7² × 439¹

Step-2: Prime Factorization of 21519

Prime factors of 21519 are 3, 797. Prime factorization of 21519 in exponential form is:

21519 = 3³ × 797¹

Step-3: Factors of 21511

List of positive integer factors of 21511 that divides 21511 without a remainder.

1, 7, 49, 439, 3073

Step-4: Factors of 21519

List of positive integer factors of 21519 that divides 21511 without a remainder.

1, 3, 9, 27, 797, 2391, 7173

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21511 and 21519. The biggest common factor number is the GCF number.
So the greatest common factor 21511 and 21519 is 1.

Also check out the Least Common Multiple of 21511 and 21519