What is the Least Common Multiple of 42400 and 42418?

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 42400 and 42418 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42400 and 42418, than apply into the LCM equation.

GCF(42400,42418) = 2
LCM(42400,42418) = ( 42400 × 42418) / 2
LCM(42400,42418) = 1798523200 / 2
LCM(42400,42418) = 899261600

Least Common Multiple (LCM) of 42400 and 42418 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42400 and 42418. First we will calculate the prime factors of 42400 and 42418.

Prime Factorization of 42400

Prime Factorization of 42418

Now multiplying the highest exponent prime factors to calculate the LCM of 42400 and 42418.

LCM(42400,42418) = 2⁵ × 5² × 53¹ × 127¹ × 167¹
LCM(42400,42418) = 899261600