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What is the Least Common Multiple of 1161 and 1165?

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 (LCM) of 1161 and 1165 is 1352565.

LCM(1161,1165) = 1352565

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Least Common Multiple of 1161 and 1165 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1161 and 1165, than apply into the LCM equation.

GCF(1161,1165) = 1
LCM(1161,1165) = ( 1161 × 1165) / 1
LCM(1161,1165) = 1352565 / 1
LCM(1161,1165) = 1352565

Least Common Multiple (LCM) of 1161 and 1165 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1161 and 1165. First we will calculate the prime factors of 1161 and 1165.

Prime Factorization of 1161

Prime factors of 1161 are 3, 43. Prime factorization of 1161 in exponential form is:

1161 = 33 × 431

Prime Factorization of 1165

Prime factors of 1165 are 5, 233. Prime factorization of 1165 in exponential form is:

1165 = 51 × 2331

Now multiplying the highest exponent prime factors to calculate the LCM of 1161 and 1165.

LCM(1161,1165) = 33 × 431 × 51 × 2331
LCM(1161,1165) = 1352565