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What is the Least Common Multiple of 1803 and 1812?

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 1812 is 1089012.

LCM(1803,1812) = 1089012

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Least Common Multiple of 1803 and 1812 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 1812, than apply into the LCM equation.

GCF(1803,1812) = 3
LCM(1803,1812) = ( 1803 × 1812) / 3
LCM(1803,1812) = 3267036 / 3
LCM(1803,1812) = 1089012

Least Common Multiple (LCM) of 1803 and 1812 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1803 and 1812. First we will calculate the prime factors of 1803 and 1812.

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 1812

Prime factors of 1812 are 2, 3, 151. Prime factorization of 1812 in exponential form is:

1812 = 22 × 31 × 1511

Now multiplying the highest exponent prime factors to calculate the LCM of 1803 and 1812.

LCM(1803,1812) = 31 × 6011 × 22 × 1511
LCM(1803,1812) = 1089012