What is the Least Common Multiple of 2409 and 2415?

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 2409 and 2415 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2409 and 2415, than apply into the LCM equation.

GCF(2409,2415) = 3
LCM(2409,2415) = ( 2409 × 2415) / 3
LCM(2409,2415) = 5817735 / 3
LCM(2409,2415) = 1939245

Least Common Multiple (LCM) of 2409 and 2415 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2409 and 2415. First we will calculate the prime factors of 2409 and 2415.

Prime Factorization of 2409

Prime Factorization of 2415

Now multiplying the highest exponent prime factors to calculate the LCM of 2409 and 2415.

LCM(2409,2415) = 3¹ × 11¹ × 73¹ × 5¹ × 7¹ × 23¹
LCM(2409,2415) = 1939245