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What is the Least Common Multiple of 1802 and 1806?

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 1802 and 1806 is 1627206.

LCM(1802,1806) = 1627206

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Least Common Multiple of 1802 and 1806 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1802 and 1806, than apply into the LCM equation.

GCF(1802,1806) = 2
LCM(1802,1806) = ( 1802 × 1806) / 2
LCM(1802,1806) = 3254412 / 2
LCM(1802,1806) = 1627206

Least Common Multiple (LCM) of 1802 and 1806 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1802 and 1806. First we will calculate the prime factors of 1802 and 1806.

Prime Factorization of 1802

Prime factors of 1802 are 2, 17, 53. Prime factorization of 1802 in exponential form is:

1802 = 21 × 171 × 531

Prime Factorization of 1806

Prime factors of 1806 are 2, 3, 7, 43. Prime factorization of 1806 in exponential form is:

1806 = 21 × 31 × 71 × 431

Now multiplying the highest exponent prime factors to calculate the LCM of 1802 and 1806.

LCM(1802,1806) = 21 × 171 × 531 × 31 × 71 × 431
LCM(1802,1806) = 1627206