What is the Least Common Multiple of 19891 and 19910?

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 19891 and 19910 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19891 and 19910, than apply into the LCM equation.

GCF(19891,19910) = 1
LCM(19891,19910) = ( 19891 × 19910) / 1
LCM(19891,19910) = 396029810 / 1
LCM(19891,19910) = 396029810

Least Common Multiple (LCM) of 19891 and 19910 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19891 and 19910. First we will calculate the prime factors of 19891 and 19910.

Prime Factorization of 19891

Prime Factorization of 19910

Now multiplying the highest exponent prime factors to calculate the LCM of 19891 and 19910.

LCM(19891,19910) = 19891¹ × 2¹ × 5¹ × 11¹ × 181¹
LCM(19891,19910) = 396029810