What is the Least Common Multiple of 2178 and 2189?

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 2178 and 2189 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2178 and 2189, than apply into the LCM equation.

GCF(2178,2189) = 11
LCM(2178,2189) = ( 2178 × 2189) / 11
LCM(2178,2189) = 4767642 / 11
LCM(2178,2189) = 433422

Least Common Multiple (LCM) of 2178 and 2189 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2178 and 2189. First we will calculate the prime factors of 2178 and 2189.

Prime Factorization of 2178

Prime Factorization of 2189

Now multiplying the highest exponent prime factors to calculate the LCM of 2178 and 2189.

LCM(2178,2189) = 2¹ × 3² × 11² × 199¹
LCM(2178,2189) = 433422