What is the Least Common Multiple of 72160 and 72180?

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 72160 and 72180 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 72160 and 72180, than apply into the LCM equation.

GCF(72160,72180) = 20
LCM(72160,72180) = ( 72160 × 72180) / 20
LCM(72160,72180) = 5208508800 / 20
LCM(72160,72180) = 260425440

Least Common Multiple (LCM) of 72160 and 72180 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 72160 and 72180. First we will calculate the prime factors of 72160 and 72180.

Prime Factorization of 72160

Prime Factorization of 72180

Now multiplying the highest exponent prime factors to calculate the LCM of 72160 and 72180.

LCM(72160,72180) = 2⁵ × 5¹ × 11¹ × 41¹ × 3² × 401¹
LCM(72160,72180) = 260425440