What is the Least Common Multiple of 15990 and 15997?

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 15990 and 15997 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15990 and 15997, than apply into the LCM equation.

GCF(15990,15997) = 1
LCM(15990,15997) = ( 15990 × 15997) / 1
LCM(15990,15997) = 255792030 / 1
LCM(15990,15997) = 255792030

Least Common Multiple (LCM) of 15990 and 15997 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15990 and 15997. First we will calculate the prime factors of 15990 and 15997.

Prime Factorization of 15990

Prime Factorization of 15997

Now multiplying the highest exponent prime factors to calculate the LCM of 15990 and 15997.

LCM(15990,15997) = 2¹ × 3¹ × 5¹ × 13¹ × 41¹ × 17¹ × 941¹
LCM(15990,15997) = 255792030