What is the Least Common Multiple of 2405 and 2409?

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 2405 and 2409 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2405 and 2409, than apply into the LCM equation.

GCF(2405,2409) = 1
LCM(2405,2409) = ( 2405 × 2409) / 1
LCM(2405,2409) = 5793645 / 1
LCM(2405,2409) = 5793645

Least Common Multiple (LCM) of 2405 and 2409 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2405 and 2409. First we will calculate the prime factors of 2405 and 2409.

Prime Factorization of 2405

Prime Factorization of 2409

Now multiplying the highest exponent prime factors to calculate the LCM of 2405 and 2409.

LCM(2405,2409) = 5¹ × 13¹ × 37¹ × 3¹ × 11¹ × 73¹
LCM(2405,2409) = 5793645