What is the Least Common Multiple of 39978 and 39991?

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 39991 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 39991, than apply into the LCM equation.

GCF(39978,39991) = 1
LCM(39978,39991) = ( 39978 × 39991) / 1
LCM(39978,39991) = 1598760198 / 1
LCM(39978,39991) = 1598760198

Least Common Multiple (LCM) of 39978 and 39991 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39978 and 39991. First we will calculate the prime factors of 39978 and 39991.

Prime Factorization of 39978

Prime Factorization of 39991

Now multiplying the highest exponent prime factors to calculate the LCM of 39978 and 39991.

LCM(39978,39991) = 2¹ × 3² × 2221¹ × 7¹ × 29¹ × 197¹
LCM(39978,39991) = 1598760198