What is the Least Common Multiple of 18516 and 18520?

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 18516 and 18520 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18516 and 18520, than apply into the LCM equation.

GCF(18516,18520) = 4
LCM(18516,18520) = ( 18516 × 18520) / 4
LCM(18516,18520) = 342916320 / 4
LCM(18516,18520) = 85729080

Least Common Multiple (LCM) of 18516 and 18520 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18516 and 18520. First we will calculate the prime factors of 18516 and 18520.

Prime Factorization of 18516

Prime Factorization of 18520

Now multiplying the highest exponent prime factors to calculate the LCM of 18516 and 18520.

LCM(18516,18520) = 2³ × 3¹ × 1543¹ × 5¹ × 463¹
LCM(18516,18520) = 85729080