What is the Least Common Multiple of 78724 and 78728?

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 78724 and 78728 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78724 and 78728, than apply into the LCM equation.

GCF(78724,78728) = 4
LCM(78724,78728) = ( 78724 × 78728) / 4
LCM(78724,78728) = 6197783072 / 4
LCM(78724,78728) = 1549445768

Least Common Multiple (LCM) of 78724 and 78728 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78724 and 78728. First we will calculate the prime factors of 78724 and 78728.

Prime Factorization of 78724

Prime Factorization of 78728

Now multiplying the highest exponent prime factors to calculate the LCM of 78724 and 78728.

LCM(78724,78728) = 2³ × 19681¹ × 13¹ × 757¹
LCM(78724,78728) = 1549445768