What is the Least Common Multiple of 21503 and 21511?

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 21503 and 21511 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21503 and 21511, than apply into the LCM equation.

GCF(21503,21511) = 1
LCM(21503,21511) = ( 21503 × 21511) / 1
LCM(21503,21511) = 462551033 / 1
LCM(21503,21511) = 462551033

Least Common Multiple (LCM) of 21503 and 21511 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21503 and 21511. First we will calculate the prime factors of 21503 and 21511.

Prime Factorization of 21503

Prime Factorization of 21511

Now multiplying the highest exponent prime factors to calculate the LCM of 21503 and 21511.

LCM(21503,21511) = 21503¹ × 7² × 439¹
LCM(21503,21511) = 462551033