What is the Greatest Common Factor of 12381 and 12390?

Greatest common factor (GCF) of 12381 and 12390 is 3.

GCF(12381,12390) = 3

We will now calculate the prime factors of 12381 and 12390, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12381 and 12390.

How to find the GCF of 12381 and 12390?

We will first find the prime factorization of 12381 and 12390. After we will calculate the factors of 12381 and 12390 and find the biggest common factor number .

Step-1: Prime Factorization of 12381

Prime factors of 12381 are 3, 4127. Prime factorization of 12381 in exponential form is:

12381 = 3¹ × 4127¹

Step-2: Prime Factorization of 12390

Prime factors of 12390 are 2, 3, 5, 7, 59. Prime factorization of 12390 in exponential form is:

12390 = 2¹ × 3¹ × 5¹ × 7¹ × 59¹

Step-3: Factors of 12381

List of positive integer factors of 12381 that divides 12381 without a remainder.

1, 3, 4127

Step-4: Factors of 12390

List of positive integer factors of 12390 that divides 12381 without a remainder.

1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 59, 70, 105, 118, 177, 210, 295, 354, 413, 590, 826, 885, 1239, 1770, 2065, 2478, 4130, 6195

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12381 and 12390. The biggest common factor number is the GCF number.
So the greatest common factor 12381 and 12390 is 3.

Also check out the Least Common Multiple of 12381 and 12390