What is the Least Common Multiple of 19871 and 19889?

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 19871 and 19889 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19871 and 19889, than apply into the LCM equation.

GCF(19871,19889) = 1
LCM(19871,19889) = ( 19871 × 19889) / 1
LCM(19871,19889) = 395214319 / 1
LCM(19871,19889) = 395214319

Least Common Multiple (LCM) of 19871 and 19889 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19871 and 19889. First we will calculate the prime factors of 19871 and 19889.

Prime Factorization of 19871

Prime Factorization of 19889

Now multiplying the highest exponent prime factors to calculate the LCM of 19871 and 19889.

LCM(19871,19889) = 31¹ × 641¹ × 19889¹
LCM(19871,19889) = 395214319