What is the Least Common Multiple of 15717 and 15721?

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 15717 and 15721 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15717 and 15721, than apply into the LCM equation.

GCF(15717,15721) = 1
LCM(15717,15721) = ( 15717 × 15721) / 1
LCM(15717,15721) = 247086957 / 1
LCM(15717,15721) = 247086957

Least Common Multiple (LCM) of 15717 and 15721 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15717 and 15721. First we will calculate the prime factors of 15717 and 15721.

Prime Factorization of 15717

Prime Factorization of 15721

Now multiplying the highest exponent prime factors to calculate the LCM of 15717 and 15721.

LCM(15717,15721) = 3¹ × 13² × 31¹ × 79¹ × 199¹
LCM(15717,15721) = 247086957