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What is the Least Common Multiple of 1787 and 1805?

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 1787 and 1805 is 3225535.

LCM(1787,1805) = 3225535

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Least Common Multiple of 1787 and 1805 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1787 and 1805, than apply into the LCM equation.

GCF(1787,1805) = 1
LCM(1787,1805) = ( 1787 × 1805) / 1
LCM(1787,1805) = 3225535 / 1
LCM(1787,1805) = 3225535

Least Common Multiple (LCM) of 1787 and 1805 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1787 and 1805. First we will calculate the prime factors of 1787 and 1805.

Prime Factorization of 1787

Prime factors of 1787 are 1787. Prime factorization of 1787 in exponential form is:

1787 = 17871

Prime Factorization of 1805

Prime factors of 1805 are 5, 19. Prime factorization of 1805 in exponential form is:

1805 = 51 × 192

Now multiplying the highest exponent prime factors to calculate the LCM of 1787 and 1805.

LCM(1787,1805) = 17871 × 51 × 192
LCM(1787,1805) = 3225535