What is the Least Common Multiple of 84020 and 84040?

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 84020 and 84040 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 84020 and 84040, than apply into the LCM equation.

GCF(84020,84040) = 20
LCM(84020,84040) = ( 84020 × 84040) / 20
LCM(84020,84040) = 7061040800 / 20
LCM(84020,84040) = 353052040

Least Common Multiple (LCM) of 84020 and 84040 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 84020 and 84040. First we will calculate the prime factors of 84020 and 84040.

Prime Factorization of 84020

Prime Factorization of 84040

Now multiplying the highest exponent prime factors to calculate the LCM of 84020 and 84040.

LCM(84020,84040) = 2³ × 5¹ × 4201¹ × 11¹ × 191¹
LCM(84020,84040) = 353052040