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What is the Least Common Multiple of 798 and 805?

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 798 and 805 is 91770.

LCM(798,805) = 91770

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Least Common Multiple of 798 and 805 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 798 and 805, than apply into the LCM equation.

GCF(798,805) = 7
LCM(798,805) = ( 798 × 805) / 7
LCM(798,805) = 642390 / 7
LCM(798,805) = 91770

Least Common Multiple (LCM) of 798 and 805 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 798 and 805. First we will calculate the prime factors of 798 and 805.

Prime Factorization of 798

Prime factors of 798 are 2, 3, 7, 19. Prime factorization of 798 in exponential form is:

798 = 21 × 31 × 71 × 191

Prime Factorization of 805

Prime factors of 805 are 5, 7, 23. Prime factorization of 805 in exponential form is:

805 = 51 × 71 × 231

Now multiplying the highest exponent prime factors to calculate the LCM of 798 and 805.

LCM(798,805) = 21 × 31 × 71 × 191 × 51 × 231
LCM(798,805) = 91770