What is the Least Common Multiple of 42115 and 42128?

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 42115 and 42128 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42115 and 42128, than apply into the LCM equation.

GCF(42115,42128) = 1
LCM(42115,42128) = ( 42115 × 42128) / 1
LCM(42115,42128) = 1774220720 / 1
LCM(42115,42128) = 1774220720

Least Common Multiple (LCM) of 42115 and 42128 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42115 and 42128. First we will calculate the prime factors of 42115 and 42128.

Prime Factorization of 42115

Prime Factorization of 42128

Now multiplying the highest exponent prime factors to calculate the LCM of 42115 and 42128.

LCM(42115,42128) = 5¹ × 8423¹ × 2⁴ × 2633¹
LCM(42115,42128) = 1774220720