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What is the Least Common Multiple of 1582 and 1590?

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 1582 and 1590 is 1257690.

LCM(1582,1590) = 1257690

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Least Common Multiple of 1582 and 1590 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1582 and 1590, than apply into the LCM equation.

GCF(1582,1590) = 2
LCM(1582,1590) = ( 1582 × 1590) / 2
LCM(1582,1590) = 2515380 / 2
LCM(1582,1590) = 1257690

Least Common Multiple (LCM) of 1582 and 1590 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1582 and 1590. First we will calculate the prime factors of 1582 and 1590.

Prime Factorization of 1582

Prime factors of 1582 are 2, 7, 113. Prime factorization of 1582 in exponential form is:

1582 = 21 × 71 × 1131

Prime Factorization of 1590

Prime factors of 1590 are 2, 3, 5, 53. Prime factorization of 1590 in exponential form is:

1590 = 21 × 31 × 51 × 531

Now multiplying the highest exponent prime factors to calculate the LCM of 1582 and 1590.

LCM(1582,1590) = 21 × 71 × 1131 × 31 × 51 × 531
LCM(1582,1590) = 1257690