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What is the Least Common Multiple of 13865 and 13880?

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 13865 and 13880 is 38489240.

LCM(13865,13880) = 38489240

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Least Common Multiple of 13865 and 13880 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 13865 and 13880, than apply into the LCM equation.

GCF(13865,13880) = 5
LCM(13865,13880) = ( 13865 × 13880) / 5
LCM(13865,13880) = 192446200 / 5
LCM(13865,13880) = 38489240

Least Common Multiple (LCM) of 13865 and 13880 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 13865 and 13880. First we will calculate the prime factors of 13865 and 13880.

Prime Factorization of 13865

Prime factors of 13865 are 5, 47, 59. Prime factorization of 13865 in exponential form is:

13865 = 51 × 471 × 591

Prime Factorization of 13880

Prime factors of 13880 are 2, 5, 347. Prime factorization of 13880 in exponential form is:

13880 = 23 × 51 × 3471

Now multiplying the highest exponent prime factors to calculate the LCM of 13865 and 13880.

LCM(13865,13880) = 51 × 471 × 591 × 23 × 3471
LCM(13865,13880) = 38489240