What is the Least Common Multiple of 19891 and 19900?

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 19891 and 19900 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19891 and 19900, than apply into the LCM equation.

GCF(19891,19900) = 1
LCM(19891,19900) = ( 19891 × 19900) / 1
LCM(19891,19900) = 395830900 / 1
LCM(19891,19900) = 395830900

Least Common Multiple (LCM) of 19891 and 19900 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19891 and 19900. First we will calculate the prime factors of 19891 and 19900.

Prime Factorization of 19891

Prime Factorization of 19900

Now multiplying the highest exponent prime factors to calculate the LCM of 19891 and 19900.

LCM(19891,19900) = 19891¹ × 2² × 5² × 199¹
LCM(19891,19900) = 395830900