What is the Greatest Common Factor of 21473 and 21480?

Greatest common factor (GCF) of 21473 and 21480 is 1.

GCF(21473,21480) = 1

We will now calculate the prime factors of 21473 and 21480, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21473 and 21480.

How to find the GCF of 21473 and 21480?

We will first find the prime factorization of 21473 and 21480. After we will calculate the factors of 21473 and 21480 and find the biggest common factor number .

Step-1: Prime Factorization of 21473

Prime factors of 21473 are 109, 197. Prime factorization of 21473 in exponential form is:

21473 = 109¹ × 197¹

Step-2: Prime Factorization of 21480

Prime factors of 21480 are 2, 3, 5, 179. Prime factorization of 21480 in exponential form is:

21480 = 2³ × 3¹ × 5¹ × 179¹

Step-3: Factors of 21473

List of positive integer factors of 21473 that divides 21473 without a remainder.

1, 109, 197

Step-4: Factors of 21480

List of positive integer factors of 21480 that divides 21473 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 179, 358, 537, 716, 895, 1074, 1432, 1790, 2148, 2685, 3580, 4296, 5370, 7160, 10740

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21473 and 21480. The biggest common factor number is the GCF number.
So the greatest common factor 21473 and 21480 is 1.

Also check out the Least Common Multiple of 21473 and 21480