What is the Least Common Multiple of 1587 and 1605?

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 1587 and 1605 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1587 and 1605, than apply into the LCM equation.

GCF(1587,1605) = 3
LCM(1587,1605) = ( 1587 × 1605) / 3
LCM(1587,1605) = 2547135 / 3
LCM(1587,1605) = 849045

Least Common Multiple (LCM) of 1587 and 1605 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1587 and 1605. First we will calculate the prime factors of 1587 and 1605.

Prime Factorization of 1587

Prime Factorization of 1605

Now multiplying the highest exponent prime factors to calculate the LCM of 1587 and 1605.

LCM(1587,1605) = 3¹ × 23² × 5¹ × 107¹
LCM(1587,1605) = 849045