What is the Least Common Multiple of 1563 and 1581?

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 of 1563 and 1581 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1563 and 1581, than apply into the LCM equation.

GCF(1563,1581) = 3
LCM(1563,1581) = ( 1563 × 1581) / 3
LCM(1563,1581) = 2471103 / 3
LCM(1563,1581) = 823701

Least Common Multiple (LCM) of 1563 and 1581 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1563 and 1581. First we will calculate the prime factors of 1563 and 1581.

Prime Factorization of 1563

Prime Factorization of 1581

Now multiplying the highest exponent prime factors to calculate the LCM of 1563 and 1581.

LCM(1563,1581) = 3¹ × 521¹ × 17¹ × 31¹
LCM(1563,1581) = 823701