What is the Least Common Multiple of 19791 and 19803?

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 19791 and 19803 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19791 and 19803, than apply into the LCM equation.

GCF(19791,19803) = 3
LCM(19791,19803) = ( 19791 × 19803) / 3
LCM(19791,19803) = 391921173 / 3
LCM(19791,19803) = 130640391

Least Common Multiple (LCM) of 19791 and 19803 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19791 and 19803. First we will calculate the prime factors of 19791 and 19803.

Prime Factorization of 19791

Prime Factorization of 19803

Now multiplying the highest exponent prime factors to calculate the LCM of 19791 and 19803.

LCM(19791,19803) = 3³ × 733¹ × 7¹ × 23¹ × 41¹
LCM(19791,19803) = 130640391