What is the Least Common Multiple of 18805 and 18820?

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 18805 and 18820 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18805 and 18820, than apply into the LCM equation.

GCF(18805,18820) = 5
LCM(18805,18820) = ( 18805 × 18820) / 5
LCM(18805,18820) = 353910100 / 5
LCM(18805,18820) = 70782020

Least Common Multiple (LCM) of 18805 and 18820 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18805 and 18820. First we will calculate the prime factors of 18805 and 18820.

Prime Factorization of 18805

Prime Factorization of 18820

Now multiplying the highest exponent prime factors to calculate the LCM of 18805 and 18820.

LCM(18805,18820) = 5¹ × 3761¹ × 2² × 941¹
LCM(18805,18820) = 70782020