What is the Least Common Multiple of 11991 and 11997?

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 11991 and 11997 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 11991 and 11997, than apply into the LCM equation.

GCF(11991,11997) = 3
LCM(11991,11997) = ( 11991 × 11997) / 3
LCM(11991,11997) = 143856027 / 3
LCM(11991,11997) = 47952009

Least Common Multiple (LCM) of 11991 and 11997 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 11991 and 11997. First we will calculate the prime factors of 11991 and 11997.

Prime Factorization of 11991

Prime Factorization of 11997

Now multiplying the highest exponent prime factors to calculate the LCM of 11991 and 11997.

LCM(11991,11997) = 3² × 7¹ × 571¹ × 31¹ × 43¹
LCM(11991,11997) = 47952009