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What is the Least Common Multiple of 1816 and 1820?

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 1816 and 1820 is 826280.

LCM(1816,1820) = 826280

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Least Common Multiple of 1816 and 1820 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1816 and 1820, than apply into the LCM equation.

GCF(1816,1820) = 4
LCM(1816,1820) = ( 1816 × 1820) / 4
LCM(1816,1820) = 3305120 / 4
LCM(1816,1820) = 826280

Least Common Multiple (LCM) of 1816 and 1820 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1816 and 1820. First we will calculate the prime factors of 1816 and 1820.

Prime Factorization of 1816

Prime factors of 1816 are 2, 227. Prime factorization of 1816 in exponential form is:

1816 = 23 × 2271

Prime Factorization of 1820

Prime factors of 1820 are 2, 5, 7, 13. Prime factorization of 1820 in exponential form is:

1820 = 22 × 51 × 71 × 131

Now multiplying the highest exponent prime factors to calculate the LCM of 1816 and 1820.

LCM(1816,1820) = 23 × 2271 × 51 × 71 × 131
LCM(1816,1820) = 826280