What is the Least Common Multiple of 78408 and 78428?

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 78408 and 78428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78408 and 78428, than apply into the LCM equation.

GCF(78408,78428) = 4
LCM(78408,78428) = ( 78408 × 78428) / 4
LCM(78408,78428) = 6149382624 / 4
LCM(78408,78428) = 1537345656

Least Common Multiple (LCM) of 78408 and 78428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78408 and 78428. First we will calculate the prime factors of 78408 and 78428.

Prime Factorization of 78408

Prime Factorization of 78428

Now multiplying the highest exponent prime factors to calculate the LCM of 78408 and 78428.

LCM(78408,78428) = 2³ × 3⁴ × 11² × 7¹ × 2801¹
LCM(78408,78428) = 1537345656