What is the Least Common Multiple of 18638 and 18642?

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 18638 and 18642 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18638 and 18642, than apply into the LCM equation.

GCF(18638,18642) = 2
LCM(18638,18642) = ( 18638 × 18642) / 2
LCM(18638,18642) = 347449596 / 2
LCM(18638,18642) = 173724798

Least Common Multiple (LCM) of 18638 and 18642 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18638 and 18642. First we will calculate the prime factors of 18638 and 18642.

Prime Factorization of 18638

Prime Factorization of 18642

Now multiplying the highest exponent prime factors to calculate the LCM of 18638 and 18642.

LCM(18638,18642) = 2¹ × 9319¹ × 3¹ × 13¹ × 239¹
LCM(18638,18642) = 173724798