What is the Least Common Multiple of 19431 and 19440?

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 19431 and 19440 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19431 and 19440, than apply into the LCM equation.

GCF(19431,19440) = 9
LCM(19431,19440) = ( 19431 × 19440) / 9
LCM(19431,19440) = 377738640 / 9
LCM(19431,19440) = 41970960

Least Common Multiple (LCM) of 19431 and 19440 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19431 and 19440. First we will calculate the prime factors of 19431 and 19440.

Prime Factorization of 19431

Prime Factorization of 19440

Now multiplying the highest exponent prime factors to calculate the LCM of 19431 and 19440.

LCM(19431,19440) = 3⁵ × 17¹ × 127¹ × 2⁴ × 5¹
LCM(19431,19440) = 41970960