What is the Least Common Multiple of 19728 and 19738?

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 19728 and 19738 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19728 and 19738, than apply into the LCM equation.

GCF(19728,19738) = 2
LCM(19728,19738) = ( 19728 × 19738) / 2
LCM(19728,19738) = 389391264 / 2
LCM(19728,19738) = 194695632

Least Common Multiple (LCM) of 19728 and 19738 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19728 and 19738. First we will calculate the prime factors of 19728 and 19738.

Prime Factorization of 19728

Prime Factorization of 19738

Now multiplying the highest exponent prime factors to calculate the LCM of 19728 and 19738.

LCM(19728,19738) = 2⁴ × 3² × 137¹ × 71¹ × 139¹
LCM(19728,19738) = 194695632