What is the Least Common Multiple of 18981 and 18990?

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 18981 and 18990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18981 and 18990, than apply into the LCM equation.

GCF(18981,18990) = 9
LCM(18981,18990) = ( 18981 × 18990) / 9
LCM(18981,18990) = 360449190 / 9
LCM(18981,18990) = 40049910

Least Common Multiple (LCM) of 18981 and 18990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18981 and 18990. First we will calculate the prime factors of 18981 and 18990.

Prime Factorization of 18981

Prime Factorization of 18990

Now multiplying the highest exponent prime factors to calculate the LCM of 18981 and 18990.

LCM(18981,18990) = 3³ × 19¹ × 37¹ × 2¹ × 5¹ × 211¹
LCM(18981,18990) = 40049910