What is the Least Common Multiple of 328 and 340?

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 328 and 340 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 328 and 340, than apply into the LCM equation.

GCF(328,340) = 4
LCM(328,340) = ( 328 × 340) / 4
LCM(328,340) = 111520 / 4
LCM(328,340) = 27880

Least Common Multiple (LCM) of 328 and 340 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 328 and 340. First we will calculate the prime factors of 328 and 340.

Prime Factorization of 328

Prime Factorization of 340

Now multiplying the highest exponent prime factors to calculate the LCM of 328 and 340.

LCM(328,340) = 2³ × 41¹ × 5¹ × 17¹
LCM(328,340) = 27880