What is the Least Common Multiple of 31221 and 31230?

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 31221 and 31230 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31221 and 31230, than apply into the LCM equation.

GCF(31221,31230) = 9
LCM(31221,31230) = ( 31221 × 31230) / 9
LCM(31221,31230) = 975031830 / 9
LCM(31221,31230) = 108336870

Least Common Multiple (LCM) of 31221 and 31230 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31221 and 31230. First we will calculate the prime factors of 31221 and 31230.

Prime Factorization of 31221

Prime Factorization of 31230

Now multiplying the highest exponent prime factors to calculate the LCM of 31221 and 31230.

LCM(31221,31230) = 3² × 3469¹ × 2¹ × 5¹ × 347¹
LCM(31221,31230) = 108336870