What is the Least Common Multiple of 1142 and 1155?

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 1142 and 1155 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1142 and 1155, than apply into the LCM equation.

GCF(1142,1155) = 1
LCM(1142,1155) = ( 1142 × 1155) / 1
LCM(1142,1155) = 1319010 / 1
LCM(1142,1155) = 1319010

Least Common Multiple (LCM) of 1142 and 1155 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1142 and 1155. First we will calculate the prime factors of 1142 and 1155.

Prime Factorization of 1142

Prime Factorization of 1155

Now multiplying the highest exponent prime factors to calculate the LCM of 1142 and 1155.

LCM(1142,1155) = 2¹ × 571¹ × 3¹ × 5¹ × 7¹ × 11¹
LCM(1142,1155) = 1319010