What is the Least Common Multiple of 20800 and 20815?

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 20800 and 20815 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20800 and 20815, than apply into the LCM equation.

GCF(20800,20815) = 5
LCM(20800,20815) = ( 20800 × 20815) / 5
LCM(20800,20815) = 432952000 / 5
LCM(20800,20815) = 86590400

Least Common Multiple (LCM) of 20800 and 20815 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20800 and 20815. First we will calculate the prime factors of 20800 and 20815.

Prime Factorization of 20800

Prime Factorization of 20815

Now multiplying the highest exponent prime factors to calculate the LCM of 20800 and 20815.

LCM(20800,20815) = 2⁶ × 5² × 13¹ × 23¹ × 181¹
LCM(20800,20815) = 86590400