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What is the Least Common Multiple of 18421 and 18439?

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 18421 and 18439 is 339664819.

LCM(18421,18439) = 339664819

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Least Common Multiple of 18421 and 18439 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18421 and 18439, than apply into the LCM equation.

GCF(18421,18439) = 1
LCM(18421,18439) = ( 18421 × 18439) / 1
LCM(18421,18439) = 339664819 / 1
LCM(18421,18439) = 339664819

Least Common Multiple (LCM) of 18421 and 18439 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18421 and 18439. First we will calculate the prime factors of 18421 and 18439.

Prime Factorization of 18421

Prime factors of 18421 are 13, 109. Prime factorization of 18421 in exponential form is:

18421 = 132 × 1091

Prime Factorization of 18439

Prime factors of 18439 are 18439. Prime factorization of 18439 in exponential form is:

18439 = 184391

Now multiplying the highest exponent prime factors to calculate the LCM of 18421 and 18439.

LCM(18421,18439) = 132 × 1091 × 184391
LCM(18421,18439) = 339664819