What is the Least Common Multiple of 12390 and 12399?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least Common Multiple of 12390 and 12399 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12390 and 12399, than apply into the LCM equation.

GCF(12390,12399) = 3
LCM(12390,12399) = ( 12390 × 12399) / 3
LCM(12390,12399) = 153623610 / 3
LCM(12390,12399) = 51207870

Least Common Multiple (LCM) of 12390 and 12399 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12390 and 12399. First we will calculate the prime factors of 12390 and 12399.

Prime Factorization of 12390

Prime Factorization of 12399

Now multiplying the highest exponent prime factors to calculate the LCM of 12390 and 12399.

LCM(12390,12399) = 2¹ × 3¹ × 5¹ × 7¹ × 59¹ × 4133¹
LCM(12390,12399) = 51207870