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What is the Least Common Multiple of 1185 and 1189?

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 1185 and 1189 is 1408965.

LCM(1185,1189) = 1408965

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Least Common Multiple of 1185 and 1189 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1185 and 1189, than apply into the LCM equation.

GCF(1185,1189) = 1
LCM(1185,1189) = ( 1185 × 1189) / 1
LCM(1185,1189) = 1408965 / 1
LCM(1185,1189) = 1408965

Least Common Multiple (LCM) of 1185 and 1189 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1185 and 1189. First we will calculate the prime factors of 1185 and 1189.

Prime Factorization of 1185

Prime factors of 1185 are 3, 5, 79. Prime factorization of 1185 in exponential form is:

1185 = 31 × 51 × 791

Prime Factorization of 1189

Prime factors of 1189 are 29, 41. Prime factorization of 1189 in exponential form is:

1189 = 291 × 411

Now multiplying the highest exponent prime factors to calculate the LCM of 1185 and 1189.

LCM(1185,1189) = 31 × 51 × 791 × 291 × 411
LCM(1185,1189) = 1408965