What is the Least Common Multiple of 78020 and 78040?

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 78020 and 78040 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78020 and 78040, than apply into the LCM equation.

GCF(78020,78040) = 20
LCM(78020,78040) = ( 78020 × 78040) / 20
LCM(78020,78040) = 6088680800 / 20
LCM(78020,78040) = 304434040

Least Common Multiple (LCM) of 78020 and 78040 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78020 and 78040. First we will calculate the prime factors of 78020 and 78040.

Prime Factorization of 78020

Prime Factorization of 78040

Now multiplying the highest exponent prime factors to calculate the LCM of 78020 and 78040.

LCM(78020,78040) = 2³ × 5¹ × 47¹ × 83¹ × 1951¹
LCM(78020,78040) = 304434040