What is the Least Common Multiple of 78381 and 78390?

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 78381 and 78390 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78381 and 78390, than apply into the LCM equation.

GCF(78381,78390) = 9
LCM(78381,78390) = ( 78381 × 78390) / 9
LCM(78381,78390) = 6144286590 / 9
LCM(78381,78390) = 682698510

Least Common Multiple (LCM) of 78381 and 78390 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78381 and 78390. First we will calculate the prime factors of 78381 and 78390.

Prime Factorization of 78381

Prime Factorization of 78390

Now multiplying the highest exponent prime factors to calculate the LCM of 78381 and 78390.

LCM(78381,78390) = 3³ × 2903¹ × 2¹ × 5¹ × 13¹ × 67¹
LCM(78381,78390) = 682698510