What is the Least Common Multiple of 18005 and 18020?

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 18005 and 18020 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18005 and 18020, than apply into the LCM equation.

GCF(18005,18020) = 5
LCM(18005,18020) = ( 18005 × 18020) / 5
LCM(18005,18020) = 324450100 / 5
LCM(18005,18020) = 64890020

Least Common Multiple (LCM) of 18005 and 18020 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18005 and 18020. First we will calculate the prime factors of 18005 and 18020.

Prime Factorization of 18005

Prime Factorization of 18020

Now multiplying the highest exponent prime factors to calculate the LCM of 18005 and 18020.

LCM(18005,18020) = 5¹ × 13¹ × 277¹ × 2² × 17¹ × 53¹
LCM(18005,18020) = 64890020