What is the Least Common Multiple of 39978 and 39982?

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 39978 and 39982 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39978 and 39982, than apply into the LCM equation.

GCF(39978,39982) = 2
LCM(39978,39982) = ( 39978 × 39982) / 2
LCM(39978,39982) = 1598400396 / 2
LCM(39978,39982) = 799200198

Least Common Multiple (LCM) of 39978 and 39982 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39978 and 39982. First we will calculate the prime factors of 39978 and 39982.

Prime Factorization of 39978

Prime Factorization of 39982

Now multiplying the highest exponent prime factors to calculate the LCM of 39978 and 39982.

LCM(39978,39982) = 2¹ × 3² × 2221¹ × 19991¹
LCM(39978,39982) = 799200198