What is the Least Common Multiple of 81990 and 82005?

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 81990 and 82005 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81990 and 82005, than apply into the LCM equation.

GCF(81990,82005) = 15
LCM(81990,82005) = ( 81990 × 82005) / 15
LCM(81990,82005) = 6723589950 / 15
LCM(81990,82005) = 448239330

Least Common Multiple (LCM) of 81990 and 82005 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81990 and 82005. First we will calculate the prime factors of 81990 and 82005.

Prime Factorization of 81990

Prime Factorization of 82005

Now multiplying the highest exponent prime factors to calculate the LCM of 81990 and 82005.

LCM(81990,82005) = 2¹ × 3² × 5¹ × 911¹ × 7¹ × 11¹ × 71¹
LCM(81990,82005) = 448239330