What is the Least Common Multiple of 51420 and 51428?

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 51420 and 51428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 51420 and 51428, than apply into the LCM equation.

GCF(51420,51428) = 4
LCM(51420,51428) = ( 51420 × 51428) / 4
LCM(51420,51428) = 2644427760 / 4
LCM(51420,51428) = 661106940

Least Common Multiple (LCM) of 51420 and 51428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 51420 and 51428. First we will calculate the prime factors of 51420 and 51428.

Prime Factorization of 51420

Prime Factorization of 51428

Now multiplying the highest exponent prime factors to calculate the LCM of 51420 and 51428.

LCM(51420,51428) = 2² × 3¹ × 5¹ × 857¹ × 13¹ × 23¹ × 43¹
LCM(51420,51428) = 661106940