What is the Greatest Common Factor of 15381 and 15390?

Greatest common factor (GCF) of 15381 and 15390 is 9.

GCF(15381,15390) = 9

We will now calculate the prime factors of 15381 and 15390, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15381 and 15390.

How to find the GCF of 15381 and 15390?

We will first find the prime factorization of 15381 and 15390. After we will calculate the factors of 15381 and 15390 and find the biggest common factor number .

Step-1: Prime Factorization of 15381

Prime factors of 15381 are 3, 1709. Prime factorization of 15381 in exponential form is:

15381 = 3² × 1709¹

Step-2: Prime Factorization of 15390

Prime factors of 15390 are 2, 3, 5, 19. Prime factorization of 15390 in exponential form is:

15390 = 2¹ × 3⁴ × 5¹ × 19¹

Step-3: Factors of 15381

List of positive integer factors of 15381 that divides 15381 without a remainder.

1, 3, 9, 1709, 5127

Step-4: Factors of 15390

List of positive integer factors of 15390 that divides 15381 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 19, 27, 30, 38, 45, 54, 57, 81, 90, 95, 114, 135, 162, 171, 190, 270, 285, 342, 405, 513, 570, 810, 855, 1026, 1539, 1710, 2565, 3078, 5130, 7695

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15381 and 15390. The biggest common factor number is the GCF number.
So the greatest common factor 15381 and 15390 is 9.

Also check out the Least Common Multiple of 15381 and 15390