What is the Least Common Multiple of 20687 and 20691?

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 20687 and 20691 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20687 and 20691, than apply into the LCM equation.

GCF(20687,20691) = 1
LCM(20687,20691) = ( 20687 × 20691) / 1
LCM(20687,20691) = 428034717 / 1
LCM(20687,20691) = 428034717

Least Common Multiple (LCM) of 20687 and 20691 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20687 and 20691. First we will calculate the prime factors of 20687 and 20691.

Prime Factorization of 20687

Prime Factorization of 20691

Now multiplying the highest exponent prime factors to calculate the LCM of 20687 and 20691.

LCM(20687,20691) = 137¹ × 151¹ × 3² × 11² × 19¹
LCM(20687,20691) = 428034717