What is the Least Common Multiple of 42561 and 42578?

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 42561 and 42578 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42561 and 42578, than apply into the LCM equation.

GCF(42561,42578) = 1
LCM(42561,42578) = ( 42561 × 42578) / 1
LCM(42561,42578) = 1812162258 / 1
LCM(42561,42578) = 1812162258

Least Common Multiple (LCM) of 42561 and 42578 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42561 and 42578. First we will calculate the prime factors of 42561 and 42578.

Prime Factorization of 42561

Prime Factorization of 42578

Now multiplying the highest exponent prime factors to calculate the LCM of 42561 and 42578.

LCM(42561,42578) = 3² × 4729¹ × 2¹ × 61¹ × 349¹
LCM(42561,42578) = 1812162258