What is the Greatest Common Factor of 21530 and 21547?

Greatest common factor (GCF) of 21530 and 21547 is 1.

GCF(21530,21547) = 1

We will now calculate the prime factors of 21530 and 21547, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21530 and 21547.

How to find the GCF of 21530 and 21547?

We will first find the prime factorization of 21530 and 21547. After we will calculate the factors of 21530 and 21547 and find the biggest common factor number .

Step-1: Prime Factorization of 21530

Prime factors of 21530 are 2, 5, 2153. Prime factorization of 21530 in exponential form is:

21530 = 2¹ × 5¹ × 2153¹

Step-2: Prime Factorization of 21547

Prime factors of 21547 are 29, 743. Prime factorization of 21547 in exponential form is:

21547 = 29¹ × 743¹

Step-3: Factors of 21530

List of positive integer factors of 21530 that divides 21530 without a remainder.

1, 2, 5, 10, 2153, 4306, 10765

Step-4: Factors of 21547

List of positive integer factors of 21547 that divides 21530 without a remainder.

1, 29, 743

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21530 and 21547. The biggest common factor number is the GCF number.
So the greatest common factor 21530 and 21547 is 1.

Also check out the Least Common Multiple of 21530 and 21547