What is the Least Common Multiple of 15840 and 15851?

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 15840 and 15851 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15840 and 15851, than apply into the LCM equation.

GCF(15840,15851) = 11
LCM(15840,15851) = ( 15840 × 15851) / 11
LCM(15840,15851) = 251079840 / 11
LCM(15840,15851) = 22825440

Least Common Multiple (LCM) of 15840 and 15851 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15840 and 15851. First we will calculate the prime factors of 15840 and 15851.

Prime Factorization of 15840

Prime Factorization of 15851

Now multiplying the highest exponent prime factors to calculate the LCM of 15840 and 15851.

LCM(15840,15851) = 2⁵ × 3² × 5¹ × 11² × 131¹
LCM(15840,15851) = 22825440