What is the Least Common Multiple of 19638 and 19643?

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 19643 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 19643, than apply into the LCM equation.

GCF(19638,19643) = 1
LCM(19638,19643) = ( 19638 × 19643) / 1
LCM(19638,19643) = 385749234 / 1
LCM(19638,19643) = 385749234

Least Common Multiple (LCM) of 19638 and 19643 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19638 and 19643. First we will calculate the prime factors of 19638 and 19643.

Prime Factorization of 19638

Prime Factorization of 19643

Now multiplying the highest exponent prime factors to calculate the LCM of 19638 and 19643.

LCM(19638,19643) = 2¹ × 3² × 1091¹ × 13¹ × 1511¹
LCM(19638,19643) = 385749234