What is the Greatest Common Factor of 21797 and 21810?

Greatest common factor (GCF) of 21797 and 21810 is 1.

GCF(21797,21810) = 1

We will now calculate the prime factors of 21797 and 21810, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21797 and 21810.

How to find the GCF of 21797 and 21810?

We will first find the prime factorization of 21797 and 21810. After we will calculate the factors of 21797 and 21810 and find the biggest common factor number .

Step-1: Prime Factorization of 21797

Prime factors of 21797 are 71, 307. Prime factorization of 21797 in exponential form is:

21797 = 71¹ × 307¹

Step-2: Prime Factorization of 21810

Prime factors of 21810 are 2, 3, 5, 727. Prime factorization of 21810 in exponential form is:

21810 = 2¹ × 3¹ × 5¹ × 727¹

Step-3: Factors of 21797

List of positive integer factors of 21797 that divides 21797 without a remainder.

1, 71, 307

Step-4: Factors of 21810

List of positive integer factors of 21810 that divides 21797 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 727, 1454, 2181, 3635, 4362, 7270, 10905

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21797 and 21810. The biggest common factor number is the GCF number.
So the greatest common factor 21797 and 21810 is 1.

Also check out the Least Common Multiple of 21797 and 21810