What is the Least Common Multiple of 21555 and 21568?

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 21555 and 21568 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21555 and 21568, than apply into the LCM equation.

GCF(21555,21568) = 1
LCM(21555,21568) = ( 21555 × 21568) / 1
LCM(21555,21568) = 464898240 / 1
LCM(21555,21568) = 464898240

Least Common Multiple (LCM) of 21555 and 21568 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21555 and 21568. First we will calculate the prime factors of 21555 and 21568.

Prime Factorization of 21555

Prime Factorization of 21568

Now multiplying the highest exponent prime factors to calculate the LCM of 21555 and 21568.

LCM(21555,21568) = 3² × 5¹ × 479¹ × 2⁶ × 337¹
LCM(21555,21568) = 464898240