What is the Least Common Multiple of 28020 and 28040?

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 28020 and 28040 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28020 and 28040, than apply into the LCM equation.

GCF(28020,28040) = 20
LCM(28020,28040) = ( 28020 × 28040) / 20
LCM(28020,28040) = 785680800 / 20
LCM(28020,28040) = 39284040

Least Common Multiple (LCM) of 28020 and 28040 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28020 and 28040. First we will calculate the prime factors of 28020 and 28040.

Prime Factorization of 28020

Prime Factorization of 28040

Now multiplying the highest exponent prime factors to calculate the LCM of 28020 and 28040.

LCM(28020,28040) = 2³ × 3¹ × 5¹ × 467¹ × 701¹
LCM(28020,28040) = 39284040