What is the Least Common Multiple of 15360 and 15380?

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 15360 and 15380 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15360 and 15380, than apply into the LCM equation.

GCF(15360,15380) = 20
LCM(15360,15380) = ( 15360 × 15380) / 20
LCM(15360,15380) = 236236800 / 20
LCM(15360,15380) = 11811840

Least Common Multiple (LCM) of 15360 and 15380 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15360 and 15380. First we will calculate the prime factors of 15360 and 15380.

Prime Factorization of 15360

Prime Factorization of 15380

Now multiplying the highest exponent prime factors to calculate the LCM of 15360 and 15380.

LCM(15360,15380) = 2¹⁰ × 3¹ × 5¹ × 769¹
LCM(15360,15380) = 11811840