What is the Least Common Multiple of 31391 and 31409?

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 31391 and 31409 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31391 and 31409, than apply into the LCM equation.

GCF(31391,31409) = 1
LCM(31391,31409) = ( 31391 × 31409) / 1
LCM(31391,31409) = 985959919 / 1
LCM(31391,31409) = 985959919

Least Common Multiple (LCM) of 31391 and 31409 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31391 and 31409. First we will calculate the prime factors of 31391 and 31409.

Prime Factorization of 31391

Prime Factorization of 31409

Now multiplying the highest exponent prime factors to calculate the LCM of 31391 and 31409.

LCM(31391,31409) = 31391¹ × 7² × 641¹
LCM(31391,31409) = 985959919