What is the Least Common Multiple of 19638 and 19645?

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 19638 and 19645 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19638 and 19645, than apply into the LCM equation.

GCF(19638,19645) = 1
LCM(19638,19645) = ( 19638 × 19645) / 1
LCM(19638,19645) = 385788510 / 1
LCM(19638,19645) = 385788510

Least Common Multiple (LCM) of 19638 and 19645 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19638 and 19645. First we will calculate the prime factors of 19638 and 19645.

Prime Factorization of 19638

Prime Factorization of 19645

Now multiplying the highest exponent prime factors to calculate the LCM of 19638 and 19645.

LCM(19638,19645) = 2¹ × 3² × 1091¹ × 5¹ × 3929¹
LCM(19638,19645) = 385788510