What is the Least Common Multiple of 342 and 354?

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 342 and 354 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 342 and 354, than apply into the LCM equation.

GCF(342,354) = 6
LCM(342,354) = ( 342 × 354) / 6
LCM(342,354) = 121068 / 6
LCM(342,354) = 20178

Least Common Multiple (LCM) of 342 and 354 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 342 and 354. First we will calculate the prime factors of 342 and 354.

Prime Factorization of 342

Prime Factorization of 354

Now multiplying the highest exponent prime factors to calculate the LCM of 342 and 354.

LCM(342,354) = 2¹ × 3² × 19¹ × 59¹
LCM(342,354) = 20178