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What is the Least Common Multiple of 12782 and 12790?

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 12782 and 12790 is 81740890.

LCM(12782,12790) = 81740890

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Least Common Multiple of 12782 and 12790 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12782 and 12790, than apply into the LCM equation.

GCF(12782,12790) = 2
LCM(12782,12790) = ( 12782 × 12790) / 2
LCM(12782,12790) = 163481780 / 2
LCM(12782,12790) = 81740890

Least Common Multiple (LCM) of 12782 and 12790 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12782 and 12790. First we will calculate the prime factors of 12782 and 12790.

Prime Factorization of 12782

Prime factors of 12782 are 2, 7, 11, 83. Prime factorization of 12782 in exponential form is:

12782 = 21 × 71 × 111 × 831

Prime Factorization of 12790

Prime factors of 12790 are 2, 5, 1279. Prime factorization of 12790 in exponential form is:

12790 = 21 × 51 × 12791

Now multiplying the highest exponent prime factors to calculate the LCM of 12782 and 12790.

LCM(12782,12790) = 21 × 71 × 111 × 831 × 51 × 12791
LCM(12782,12790) = 81740890