What is the Least Common Multiple of 1143 and 1161?

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 1143 and 1161 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1143 and 1161, than apply into the LCM equation.

GCF(1143,1161) = 9
LCM(1143,1161) = ( 1143 × 1161) / 9
LCM(1143,1161) = 1327023 / 9
LCM(1143,1161) = 147447

Least Common Multiple (LCM) of 1143 and 1161 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1143 and 1161. First we will calculate the prime factors of 1143 and 1161.

Prime Factorization of 1143

Prime Factorization of 1161

Now multiplying the highest exponent prime factors to calculate the LCM of 1143 and 1161.

LCM(1143,1161) = 3³ × 127¹ × 43¹
LCM(1143,1161) = 147447