What is the Least Common Multiple of 17978 and 17998?

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 17978 and 17998 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 17978 and 17998, than apply into the LCM equation.

GCF(17978,17998) = 2
LCM(17978,17998) = ( 17978 × 17998) / 2
LCM(17978,17998) = 323568044 / 2
LCM(17978,17998) = 161784022

Least Common Multiple (LCM) of 17978 and 17998 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 17978 and 17998. First we will calculate the prime factors of 17978 and 17998.

Prime Factorization of 17978

Prime Factorization of 17998

Now multiplying the highest exponent prime factors to calculate the LCM of 17978 and 17998.

LCM(17978,17998) = 2¹ × 89¹ × 101¹ × 8999¹
LCM(17978,17998) = 161784022