What is the Least Common Multiple of 1798 and 1818?

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 1798 and 1818 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1798 and 1818, than apply into the LCM equation.

GCF(1798,1818) = 2
LCM(1798,1818) = ( 1798 × 1818) / 2
LCM(1798,1818) = 3268764 / 2
LCM(1798,1818) = 1634382

Least Common Multiple (LCM) of 1798 and 1818 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1798 and 1818. First we will calculate the prime factors of 1798 and 1818.

Prime Factorization of 1798

Prime Factorization of 1818

Now multiplying the highest exponent prime factors to calculate the LCM of 1798 and 1818.

LCM(1798,1818) = 2¹ × 29¹ × 31¹ × 3² × 101¹
LCM(1798,1818) = 1634382