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What is the Least Common Multiple of 1578 and 1591?

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 1578 and 1591 is 2510598.

LCM(1578,1591) = 2510598

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Least Common Multiple of 1578 and 1591 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1578 and 1591, than apply into the LCM equation.

GCF(1578,1591) = 1
LCM(1578,1591) = ( 1578 × 1591) / 1
LCM(1578,1591) = 2510598 / 1
LCM(1578,1591) = 2510598

Least Common Multiple (LCM) of 1578 and 1591 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1578 and 1591. First we will calculate the prime factors of 1578 and 1591.

Prime Factorization of 1578

Prime factors of 1578 are 2, 3, 263. Prime factorization of 1578 in exponential form is:

1578 = 21 × 31 × 2631

Prime Factorization of 1591

Prime factors of 1591 are 37, 43. Prime factorization of 1591 in exponential form is:

1591 = 371 × 431

Now multiplying the highest exponent prime factors to calculate the LCM of 1578 and 1591.

LCM(1578,1591) = 21 × 31 × 2631 × 371 × 431
LCM(1578,1591) = 2510598