What is the Least Common Multiple of 21786 and 21804?

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 21786 and 21804 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21786 and 21804, than apply into the LCM equation.

GCF(21786,21804) = 6
LCM(21786,21804) = ( 21786 × 21804) / 6
LCM(21786,21804) = 475021944 / 6
LCM(21786,21804) = 79170324

Least Common Multiple (LCM) of 21786 and 21804 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21786 and 21804. First we will calculate the prime factors of 21786 and 21804.

Prime Factorization of 21786

Prime Factorization of 21804

Now multiplying the highest exponent prime factors to calculate the LCM of 21786 and 21804.

LCM(21786,21804) = 2² × 3¹ × 3631¹ × 23¹ × 79¹
LCM(21786,21804) = 79170324