What is the Least Common Multiple of 21538 and 21555?

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 21538 and 21555 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21538 and 21555, than apply into the LCM equation.

GCF(21538,21555) = 1
LCM(21538,21555) = ( 21538 × 21555) / 1
LCM(21538,21555) = 464251590 / 1
LCM(21538,21555) = 464251590

Least Common Multiple (LCM) of 21538 and 21555 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21538 and 21555. First we will calculate the prime factors of 21538 and 21555.

Prime Factorization of 21538

Prime Factorization of 21555

Now multiplying the highest exponent prime factors to calculate the LCM of 21538 and 21555.

LCM(21538,21555) = 2¹ × 11² × 89¹ × 3² × 5¹ × 479¹
LCM(21538,21555) = 464251590