What is the Least Common Multiple of 31221 and 31239?

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 31239 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 31239, than apply into the LCM equation.

GCF(31221,31239) = 9
LCM(31221,31239) = ( 31221 × 31239) / 9
LCM(31221,31239) = 975312819 / 9
LCM(31221,31239) = 108368091

Least Common Multiple (LCM) of 31221 and 31239 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31221 and 31239. First we will calculate the prime factors of 31221 and 31239.

Prime Factorization of 31221

Prime Factorization of 31239

Now multiplying the highest exponent prime factors to calculate the LCM of 31221 and 31239.

LCM(31221,31239) = 3³ × 3469¹ × 13¹ × 89¹
LCM(31221,31239) = 108368091