What is the Least Common Multiple of 21744 and 21750?

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 21744 and 21750 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21744 and 21750, than apply into the LCM equation.

GCF(21744,21750) = 6
LCM(21744,21750) = ( 21744 × 21750) / 6
LCM(21744,21750) = 472932000 / 6
LCM(21744,21750) = 78822000

Least Common Multiple (LCM) of 21744 and 21750 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21744 and 21750. First we will calculate the prime factors of 21744 and 21750.

Prime Factorization of 21744

Prime Factorization of 21750

Now multiplying the highest exponent prime factors to calculate the LCM of 21744 and 21750.

LCM(21744,21750) = 2⁴ × 3² × 151¹ × 5³ × 29¹
LCM(21744,21750) = 78822000