What is the Least Common Multiple of 18990 and 18998?

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 18990 and 18998 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18990 and 18998, than apply into the LCM equation.

GCF(18990,18998) = 2
LCM(18990,18998) = ( 18990 × 18998) / 2
LCM(18990,18998) = 360772020 / 2
LCM(18990,18998) = 180386010

Least Common Multiple (LCM) of 18990 and 18998 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18990 and 18998. First we will calculate the prime factors of 18990 and 18998.

Prime Factorization of 18990

Prime Factorization of 18998

Now multiplying the highest exponent prime factors to calculate the LCM of 18990 and 18998.

LCM(18990,18998) = 2¹ × 3² × 5¹ × 211¹ × 7¹ × 23¹ × 59¹
LCM(18990,18998) = 180386010