What is the Least Common Multiple of 9981 and 9989?

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 9981 and 9989 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 9981 and 9989, than apply into the LCM equation.

GCF(9981,9989) = 1
LCM(9981,9989) = ( 9981 × 9989) / 1
LCM(9981,9989) = 99700209 / 1
LCM(9981,9989) = 99700209

Least Common Multiple (LCM) of 9981 and 9989 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 9981 and 9989. First we will calculate the prime factors of 9981 and 9989.

Prime Factorization of 9981

Prime Factorization of 9989

Now multiplying the highest exponent prime factors to calculate the LCM of 9981 and 9989.

LCM(9981,9989) = 3² × 1109¹ × 7¹ × 1427¹
LCM(9981,9989) = 99700209