What is the Least Common Multiple of 78638 and 78646?

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 78638 and 78646 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78638 and 78646, than apply into the LCM equation.

GCF(78638,78646) = 2
LCM(78638,78646) = ( 78638 × 78646) / 2
LCM(78638,78646) = 6184564148 / 2
LCM(78638,78646) = 3092282074

Least Common Multiple (LCM) of 78638 and 78646 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78638 and 78646. First we will calculate the prime factors of 78638 and 78646.

Prime Factorization of 78638

Prime Factorization of 78646

Now multiplying the highest exponent prime factors to calculate the LCM of 78638 and 78646.

LCM(78638,78646) = 2¹ × 7¹ × 41¹ × 137¹ × 39323¹
LCM(78638,78646) = 3092282074