What is the Least Common Multiple of 21855 and 21865?

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 21855 and 21865 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21855 and 21865, than apply into the LCM equation.

GCF(21855,21865) = 5
LCM(21855,21865) = ( 21855 × 21865) / 5
LCM(21855,21865) = 477859575 / 5
LCM(21855,21865) = 95571915

Least Common Multiple (LCM) of 21855 and 21865 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21855 and 21865. First we will calculate the prime factors of 21855 and 21865.

Prime Factorization of 21855

Prime Factorization of 21865

Now multiplying the highest exponent prime factors to calculate the LCM of 21855 and 21865.

LCM(21855,21865) = 3¹ × 5¹ × 31¹ × 47¹ × 4373¹
LCM(21855,21865) = 95571915