What is the Least Common Multiple of 21855 and 21863?

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 21863 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 21863, than apply into the LCM equation.

GCF(21855,21863) = 1
LCM(21855,21863) = ( 21855 × 21863) / 1
LCM(21855,21863) = 477815865 / 1
LCM(21855,21863) = 477815865

Least Common Multiple (LCM) of 21855 and 21863 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21855 and 21863. First we will calculate the prime factors of 21855 and 21863.

Prime Factorization of 21855

Prime Factorization of 21863

Now multiplying the highest exponent prime factors to calculate the LCM of 21855 and 21863.

LCM(21855,21863) = 3¹ × 5¹ × 31¹ × 47¹ × 21863¹
LCM(21855,21863) = 477815865