What is the Least Common Multiple of 1305 and 1311?

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 1305 and 1311 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1305 and 1311, than apply into the LCM equation.

GCF(1305,1311) = 3
LCM(1305,1311) = ( 1305 × 1311) / 3
LCM(1305,1311) = 1710855 / 3
LCM(1305,1311) = 570285

Least Common Multiple (LCM) of 1305 and 1311 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1305 and 1311. First we will calculate the prime factors of 1305 and 1311.

Prime Factorization of 1305

Prime Factorization of 1311

Now multiplying the highest exponent prime factors to calculate the LCM of 1305 and 1311.

LCM(1305,1311) = 3² × 5¹ × 29¹ × 19¹ × 23¹
LCM(1305,1311) = 570285