What is the Least Common Multiple of 40000 and 40020?

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 40000 and 40020 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 40000 and 40020, than apply into the LCM equation.

GCF(40000,40020) = 20
LCM(40000,40020) = ( 40000 × 40020) / 20
LCM(40000,40020) = 1600800000 / 20
LCM(40000,40020) = 80040000

Least Common Multiple (LCM) of 40000 and 40020 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 40000 and 40020. First we will calculate the prime factors of 40000 and 40020.

Prime Factorization of 40000

Prime Factorization of 40020

Now multiplying the highest exponent prime factors to calculate the LCM of 40000 and 40020.

LCM(40000,40020) = 2⁶ × 5⁴ × 3¹ × 23¹ × 29¹
LCM(40000,40020) = 80040000