What is the Least Common Multiple of 51405 and 51420?

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 51405 and 51420 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 51405 and 51420, than apply into the LCM equation.

GCF(51405,51420) = 15
LCM(51405,51420) = ( 51405 × 51420) / 15
LCM(51405,51420) = 2643245100 / 15
LCM(51405,51420) = 176216340

Least Common Multiple (LCM) of 51405 and 51420 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 51405 and 51420. First we will calculate the prime factors of 51405 and 51420.

Prime Factorization of 51405

Prime Factorization of 51420

Now multiplying the highest exponent prime factors to calculate the LCM of 51405 and 51420.

LCM(51405,51420) = 3¹ × 5¹ × 23¹ × 149¹ × 2² × 857¹
LCM(51405,51420) = 176216340