What is the Least Common Multiple of 21591 and 21603?

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 21591 and 21603 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21591 and 21603, than apply into the LCM equation.

GCF(21591,21603) = 3
LCM(21591,21603) = ( 21591 × 21603) / 3
LCM(21591,21603) = 466430373 / 3
LCM(21591,21603) = 155476791

Least Common Multiple (LCM) of 21591 and 21603 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21591 and 21603. First we will calculate the prime factors of 21591 and 21603.

Prime Factorization of 21591

Prime Factorization of 21603

Now multiplying the highest exponent prime factors to calculate the LCM of 21591 and 21603.

LCM(21591,21603) = 3² × 2399¹ × 19¹ × 379¹
LCM(21591,21603) = 155476791