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What is the Least Common Multiple of 28715 and 28730?

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 28715 and 28730 is 164996390.

LCM(28715,28730) = 164996390

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Least Common Multiple of 28715 and 28730 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28715 and 28730, than apply into the LCM equation.

GCF(28715,28730) = 5
LCM(28715,28730) = ( 28715 × 28730) / 5
LCM(28715,28730) = 824981950 / 5
LCM(28715,28730) = 164996390

Least Common Multiple (LCM) of 28715 and 28730 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28715 and 28730. First we will calculate the prime factors of 28715 and 28730.

Prime Factorization of 28715

Prime factors of 28715 are 5, 5743. Prime factorization of 28715 in exponential form is:

28715 = 51 × 57431

Prime Factorization of 28730

Prime factors of 28730 are 2, 5, 13, 17. Prime factorization of 28730 in exponential form is:

28730 = 21 × 51 × 132 × 171

Now multiplying the highest exponent prime factors to calculate the LCM of 28715 and 28730.

LCM(28715,28730) = 51 × 57431 × 21 × 132 × 171
LCM(28715,28730) = 164996390