What is the Greatest Common Factor of 5415 and 5421?

Greatest common factor (GCF) of 5415 and 5421 is 3.

GCF(5415,5421) = 3

We will now calculate the prime factors of 5415 and 5421, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 5415 and 5421.

How to find the GCF of 5415 and 5421?

We will first find the prime factorization of 5415 and 5421. After we will calculate the factors of 5415 and 5421 and find the biggest common factor number .

Step-1: Prime Factorization of 5415

Prime factors of 5415 are 3, 5, 19. Prime factorization of 5415 in exponential form is:

5415 = 3¹ × 5¹ × 19²

Step-2: Prime Factorization of 5421

Prime factors of 5421 are 3, 13, 139. Prime factorization of 5421 in exponential form is:

5421 = 3¹ × 13¹ × 139¹

Step-3: Factors of 5415

List of positive integer factors of 5415 that divides 5415 without a remainder.

1, 3, 5, 15, 19, 57, 95, 285, 361, 1083, 1805

Step-4: Factors of 5421

List of positive integer factors of 5421 that divides 5415 without a remainder.

1, 3, 13, 39, 139, 417, 1807

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 5415 and 5421. The biggest common factor number is the GCF number.
So the greatest common factor 5415 and 5421 is 3.

Also check out the Least Common Multiple of 5415 and 5421