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What is the Least Common Multiple of 12909 and 12918?

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 12909 and 12918 is 55586154.

LCM(12909,12918) = 55586154

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Least Common Multiple of 12909 and 12918 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12909 and 12918, than apply into the LCM equation.

GCF(12909,12918) = 3
LCM(12909,12918) = ( 12909 × 12918) / 3
LCM(12909,12918) = 166758462 / 3
LCM(12909,12918) = 55586154

Least Common Multiple (LCM) of 12909 and 12918 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12909 and 12918. First we will calculate the prime factors of 12909 and 12918.

Prime Factorization of 12909

Prime factors of 12909 are 3, 13, 331. Prime factorization of 12909 in exponential form is:

12909 = 31 × 131 × 3311

Prime Factorization of 12918

Prime factors of 12918 are 2, 3, 2153. Prime factorization of 12918 in exponential form is:

12918 = 21 × 31 × 21531

Now multiplying the highest exponent prime factors to calculate the LCM of 12909 and 12918.

LCM(12909,12918) = 31 × 131 × 3311 × 21 × 21531
LCM(12909,12918) = 55586154