What is the Least Common Multiple of 42020 and 42040?

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 42020 and 42040 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42020 and 42040, than apply into the LCM equation.

GCF(42020,42040) = 20
LCM(42020,42040) = ( 42020 × 42040) / 20
LCM(42020,42040) = 1766520800 / 20
LCM(42020,42040) = 88326040

Least Common Multiple (LCM) of 42020 and 42040 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42020 and 42040. First we will calculate the prime factors of 42020 and 42040.

Prime Factorization of 42020

Prime Factorization of 42040

Now multiplying the highest exponent prime factors to calculate the LCM of 42020 and 42040.

LCM(42020,42040) = 2³ × 5¹ × 11¹ × 191¹ × 1051¹
LCM(42020,42040) = 88326040