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What is the Least Common Multiple of 18389 and 18405?

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 18389 and 18405 is 338449545.

LCM(18389,18405) = 338449545

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Least Common Multiple of 18389 and 18405 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18389 and 18405, than apply into the LCM equation.

GCF(18389,18405) = 1
LCM(18389,18405) = ( 18389 × 18405) / 1
LCM(18389,18405) = 338449545 / 1
LCM(18389,18405) = 338449545

Least Common Multiple (LCM) of 18389 and 18405 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18389 and 18405. First we will calculate the prime factors of 18389 and 18405.

Prime Factorization of 18389

Prime factors of 18389 are 7, 37, 71. Prime factorization of 18389 in exponential form is:

18389 = 71 × 371 × 711

Prime Factorization of 18405

Prime factors of 18405 are 3, 5, 409. Prime factorization of 18405 in exponential form is:

18405 = 32 × 51 × 4091

Now multiplying the highest exponent prime factors to calculate the LCM of 18389 and 18405.

LCM(18389,18405) = 71 × 371 × 711 × 32 × 51 × 4091
LCM(18389,18405) = 338449545