What is the Least Common Multiple of 19861 and 19881?

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 19861 and 19881 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19861 and 19881, than apply into the LCM equation.

GCF(19861,19881) = 1
LCM(19861,19881) = ( 19861 × 19881) / 1
LCM(19861,19881) = 394856541 / 1
LCM(19861,19881) = 394856541

Least Common Multiple (LCM) of 19861 and 19881 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19861 and 19881. First we will calculate the prime factors of 19861 and 19881.

Prime Factorization of 19861

Prime Factorization of 19881

Now multiplying the highest exponent prime factors to calculate the LCM of 19861 and 19881.

LCM(19861,19881) = 19861¹ × 3² × 47²
LCM(19861,19881) = 394856541