What is the Least Common Multiple of 21355 and 21368?

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 21355 and 21368 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21355 and 21368, than apply into the LCM equation.

GCF(21355,21368) = 1
LCM(21355,21368) = ( 21355 × 21368) / 1
LCM(21355,21368) = 456313640 / 1
LCM(21355,21368) = 456313640

Least Common Multiple (LCM) of 21355 and 21368 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21355 and 21368. First we will calculate the prime factors of 21355 and 21368.

Prime Factorization of 21355

Prime Factorization of 21368

Now multiplying the highest exponent prime factors to calculate the LCM of 21355 and 21368.

LCM(21355,21368) = 5¹ × 4271¹ × 2³ × 2671¹
LCM(21355,21368) = 456313640