What is the Least Common Multiple of 42158 and 42178?

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 42158 and 42178 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42158 and 42178, than apply into the LCM equation.

GCF(42158,42178) = 2
LCM(42158,42178) = ( 42158 × 42178) / 2
LCM(42158,42178) = 1778140124 / 2
LCM(42158,42178) = 889070062

Least Common Multiple (LCM) of 42158 and 42178 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42158 and 42178. First we will calculate the prime factors of 42158 and 42178.

Prime Factorization of 42158

Prime Factorization of 42178

Now multiplying the highest exponent prime factors to calculate the LCM of 42158 and 42178.

LCM(42158,42178) = 2¹ × 107¹ × 197¹ × 21089¹
LCM(42158,42178) = 889070062