What is the Least Common Multiple of 19851 and 19871?

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 19851 and 19871 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19851 and 19871, than apply into the LCM equation.

GCF(19851,19871) = 1
LCM(19851,19871) = ( 19851 × 19871) / 1
LCM(19851,19871) = 394459221 / 1
LCM(19851,19871) = 394459221

Least Common Multiple (LCM) of 19851 and 19871 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19851 and 19871. First we will calculate the prime factors of 19851 and 19871.

Prime Factorization of 19851

Prime Factorization of 19871

Now multiplying the highest exponent prime factors to calculate the LCM of 19851 and 19871.

LCM(19851,19871) = 3¹ × 13¹ × 509¹ × 31¹ × 641¹
LCM(19851,19871) = 394459221