What is the Least Common Multiple of 15543 and 15561?

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 15543 and 15561 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15543 and 15561, than apply into the LCM equation.

GCF(15543,15561) = 9
LCM(15543,15561) = ( 15543 × 15561) / 9
LCM(15543,15561) = 241864623 / 9
LCM(15543,15561) = 26873847

Least Common Multiple (LCM) of 15543 and 15561 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15543 and 15561. First we will calculate the prime factors of 15543 and 15561.

Prime Factorization of 15543

Prime Factorization of 15561

Now multiplying the highest exponent prime factors to calculate the LCM of 15543 and 15561.

LCM(15543,15561) = 3² × 11¹ × 157¹ × 7¹ × 13¹ × 19¹
LCM(15543,15561) = 26873847