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What is the Least Common Multiple of 9983 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 (LCM) of 9983 and 9989 is 99720187.

LCM(9983,9989) = 99720187

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Least Common Multiple of 9983 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 9983 and 9989, than apply into the LCM equation.

GCF(9983,9989) = 1
LCM(9983,9989) = ( 9983 × 9989) / 1
LCM(9983,9989) = 99720187 / 1
LCM(9983,9989) = 99720187

Least Common Multiple (LCM) of 9983 and 9989 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 9983 and 9989. First we will calculate the prime factors of 9983 and 9989.

Prime Factorization of 9983

Prime factors of 9983 are 67, 149. Prime factorization of 9983 in exponential form is:

9983 = 671 × 1491

Prime Factorization of 9989

Prime factors of 9989 are 7, 1427. Prime factorization of 9989 in exponential form is:

9989 = 71 × 14271

Now multiplying the highest exponent prime factors to calculate the LCM of 9983 and 9989.

LCM(9983,9989) = 671 × 1491 × 71 × 14271
LCM(9983,9989) = 99720187