What is the Least Common Multiple of 81120 and 81135?

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 81120 and 81135 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81120 and 81135, than apply into the LCM equation.

GCF(81120,81135) = 15
LCM(81120,81135) = ( 81120 × 81135) / 15
LCM(81120,81135) = 6581671200 / 15
LCM(81120,81135) = 438778080

Least Common Multiple (LCM) of 81120 and 81135 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81120 and 81135. First we will calculate the prime factors of 81120 and 81135.

Prime Factorization of 81120

Prime Factorization of 81135

Now multiplying the highest exponent prime factors to calculate the LCM of 81120 and 81135.

LCM(81120,81135) = 2⁵ × 3³ × 5¹ × 13² × 601¹
LCM(81120,81135) = 438778080