What is the Greatest Common Factor of 21455 and 21459?

Greatest common factor (GCF) of 21455 and 21459 is 1.

GCF(21455,21459) = 1

We will now calculate the prime factors of 21455 and 21459, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21455 and 21459.

How to find the GCF of 21455 and 21459?

We will first find the prime factorization of 21455 and 21459. After we will calculate the factors of 21455 and 21459 and find the biggest common factor number .

Step-1: Prime Factorization of 21455

Prime factors of 21455 are 5, 7, 613. Prime factorization of 21455 in exponential form is:

21455 = 5¹ × 7¹ × 613¹

Step-2: Prime Factorization of 21459

Prime factors of 21459 are 3, 23, 311. Prime factorization of 21459 in exponential form is:

21459 = 3¹ × 23¹ × 311¹

Step-3: Factors of 21455

List of positive integer factors of 21455 that divides 21455 without a remainder.

1, 5, 7, 35, 613, 3065, 4291

Step-4: Factors of 21459

List of positive integer factors of 21459 that divides 21455 without a remainder.

1, 3, 23, 69, 311, 933, 7153

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21455 and 21459. The biggest common factor number is the GCF number.
So the greatest common factor 21455 and 21459 is 1.

Also check out the Least Common Multiple of 21455 and 21459