What is the Least Common Multiple of 15621 and 15640?

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 15621 and 15640 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15621 and 15640, than apply into the LCM equation.

GCF(15621,15640) = 1
LCM(15621,15640) = ( 15621 × 15640) / 1
LCM(15621,15640) = 244312440 / 1
LCM(15621,15640) = 244312440

Least Common Multiple (LCM) of 15621 and 15640 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15621 and 15640. First we will calculate the prime factors of 15621 and 15640.

Prime Factorization of 15621

Prime Factorization of 15640

Now multiplying the highest exponent prime factors to calculate the LCM of 15621 and 15640.

LCM(15621,15640) = 3¹ × 41¹ × 127¹ × 2³ × 5¹ × 17¹ × 23¹
LCM(15621,15640) = 244312440