What is the Least Common Multiple of 28191 and 28209?

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 28191 and 28209 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28191 and 28209, than apply into the LCM equation.

GCF(28191,28209) = 3
LCM(28191,28209) = ( 28191 × 28209) / 3
LCM(28191,28209) = 795239919 / 3
LCM(28191,28209) = 265079973

Least Common Multiple (LCM) of 28191 and 28209 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28191 and 28209. First we will calculate the prime factors of 28191 and 28209.

Prime Factorization of 28191

Prime Factorization of 28209

Now multiplying the highest exponent prime factors to calculate the LCM of 28191 and 28209.

LCM(28191,28209) = 3¹ × 9397¹ × 9403¹
LCM(28191,28209) = 265079973