What is the Least Common Multiple of 21516 and 21528?

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 21516 and 21528 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21516 and 21528, than apply into the LCM equation.

GCF(21516,21528) = 12
LCM(21516,21528) = ( 21516 × 21528) / 12
LCM(21516,21528) = 463196448 / 12
LCM(21516,21528) = 38599704

Least Common Multiple (LCM) of 21516 and 21528 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21516 and 21528. First we will calculate the prime factors of 21516 and 21528.

Prime Factorization of 21516

Prime Factorization of 21528

Now multiplying the highest exponent prime factors to calculate the LCM of 21516 and 21528.

LCM(21516,21528) = 2³ × 3² × 11¹ × 163¹ × 13¹ × 23¹
LCM(21516,21528) = 38599704