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What is the Least Common Multiple of 1803 and 1809?

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 1803 and 1809 is 1087209.

LCM(1803,1809) = 1087209

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Least Common Multiple of 1803 and 1809 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1803 and 1809, than apply into the LCM equation.

GCF(1803,1809) = 3
LCM(1803,1809) = ( 1803 × 1809) / 3
LCM(1803,1809) = 3261627 / 3
LCM(1803,1809) = 1087209

Least Common Multiple (LCM) of 1803 and 1809 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1803 and 1809. First we will calculate the prime factors of 1803 and 1809.

Prime Factorization of 1803

Prime factors of 1803 are 3, 601. Prime factorization of 1803 in exponential form is:

1803 = 31 × 6011

Prime Factorization of 1809

Prime factors of 1809 are 3, 67. Prime factorization of 1809 in exponential form is:

1809 = 33 × 671

Now multiplying the highest exponent prime factors to calculate the LCM of 1803 and 1809.

LCM(1803,1809) = 33 × 6011 × 671
LCM(1803,1809) = 1087209