What is the Least Common Multiple of 987 and 1003?

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 1003 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 1003, than apply into the LCM equation.

GCF(987,1003) = 1
LCM(987,1003) = ( 987 × 1003) / 1
LCM(987,1003) = 989961 / 1
LCM(987,1003) = 989961

Least Common Multiple (LCM) of 987 and 1003 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 987 and 1003. First we will calculate the prime factors of 987 and 1003.

Prime Factorization of 987

Prime Factorization of 1003

Now multiplying the highest exponent prime factors to calculate the LCM of 987 and 1003.

LCM(987,1003) = 3¹ × 7¹ × 47¹ × 17¹ × 59¹
LCM(987,1003) = 989961