What is the Least Common Multiple of 1509 and 1521?

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 1509 and 1521 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1509 and 1521, than apply into the LCM equation.

GCF(1509,1521) = 3
LCM(1509,1521) = ( 1509 × 1521) / 3
LCM(1509,1521) = 2295189 / 3
LCM(1509,1521) = 765063

Least Common Multiple (LCM) of 1509 and 1521 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1509 and 1521. First we will calculate the prime factors of 1509 and 1521.

Prime Factorization of 1509

Prime Factorization of 1521

Now multiplying the highest exponent prime factors to calculate the LCM of 1509 and 1521.

LCM(1509,1521) = 3² × 503¹ × 13²
LCM(1509,1521) = 765063