What is the Least Common Multiple of 28638 and 28642?

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 28638 and 28642 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28638 and 28642, than apply into the LCM equation.

GCF(28638,28642) = 2
LCM(28638,28642) = ( 28638 × 28642) / 2
LCM(28638,28642) = 820249596 / 2
LCM(28638,28642) = 410124798

Least Common Multiple (LCM) of 28638 and 28642 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28638 and 28642. First we will calculate the prime factors of 28638 and 28642.

Prime Factorization of 28638

Prime Factorization of 28642

Now multiplying the highest exponent prime factors to calculate the LCM of 28638 and 28642.

LCM(28638,28642) = 2¹ × 3² × 37¹ × 43¹ × 14321¹
LCM(28638,28642) = 410124798