What is the Least Common Multiple of 987 and 1005?

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 987 and 1005 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 987 and 1005, than apply into the LCM equation.

GCF(987,1005) = 3
LCM(987,1005) = ( 987 × 1005) / 3
LCM(987,1005) = 991935 / 3
LCM(987,1005) = 330645

Least Common Multiple (LCM) of 987 and 1005 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 987 and 1005. First we will calculate the prime factors of 987 and 1005.

Prime Factorization of 987

Prime Factorization of 1005

Now multiplying the highest exponent prime factors to calculate the LCM of 987 and 1005.

LCM(987,1005) = 3¹ × 7¹ × 47¹ × 5¹ × 67¹
LCM(987,1005) = 330645