What is the Least Common Multiple of 18991 and 18999?

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 18991 and 18999 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18991 and 18999, than apply into the LCM equation.

GCF(18991,18999) = 1
LCM(18991,18999) = ( 18991 × 18999) / 1
LCM(18991,18999) = 360810009 / 1
LCM(18991,18999) = 360810009

Least Common Multiple (LCM) of 18991 and 18999 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18991 and 18999. First we will calculate the prime factors of 18991 and 18999.

Prime Factorization of 18991

Prime Factorization of 18999

Now multiplying the highest exponent prime factors to calculate the LCM of 18991 and 18999.

LCM(18991,18999) = 7¹ × 2713¹ × 3² × 2111¹
LCM(18991,18999) = 360810009