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What is the Least Common Multiple of 12397 and 12405?

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 12397 and 12405 is 153784785.

LCM(12397,12405) = 153784785

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Least Common Multiple of 12397 and 12405 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12397 and 12405, than apply into the LCM equation.

GCF(12397,12405) = 1
LCM(12397,12405) = ( 12397 × 12405) / 1
LCM(12397,12405) = 153784785 / 1
LCM(12397,12405) = 153784785

Least Common Multiple (LCM) of 12397 and 12405 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12397 and 12405. First we will calculate the prime factors of 12397 and 12405.

Prime Factorization of 12397

Prime factors of 12397 are 7, 11, 23. Prime factorization of 12397 in exponential form is:

12397 = 72 × 111 × 231

Prime Factorization of 12405

Prime factors of 12405 are 3, 5, 827. Prime factorization of 12405 in exponential form is:

12405 = 31 × 51 × 8271

Now multiplying the highest exponent prime factors to calculate the LCM of 12397 and 12405.

LCM(12397,12405) = 72 × 111 × 231 × 31 × 51 × 8271
LCM(12397,12405) = 153784785