What is the Least Common Multiple of 78240 and 78254?

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 78240 and 78254 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78240 and 78254, than apply into the LCM equation.

GCF(78240,78254) = 2
LCM(78240,78254) = ( 78240 × 78254) / 2
LCM(78240,78254) = 6122592960 / 2
LCM(78240,78254) = 3061296480

Least Common Multiple (LCM) of 78240 and 78254 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78240 and 78254. First we will calculate the prime factors of 78240 and 78254.

Prime Factorization of 78240

Prime Factorization of 78254

Now multiplying the highest exponent prime factors to calculate the LCM of 78240 and 78254.

LCM(78240,78254) = 2⁵ × 3¹ × 5¹ × 163¹ × 11¹ × 3557¹
LCM(78240,78254) = 3061296480