What is the Least Common Multiple of 28657 and 28665?

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 28657 and 28665 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28657 and 28665, than apply into the LCM equation.

GCF(28657,28665) = 1
LCM(28657,28665) = ( 28657 × 28665) / 1
LCM(28657,28665) = 821452905 / 1
LCM(28657,28665) = 821452905

Least Common Multiple (LCM) of 28657 and 28665 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28657 and 28665. First we will calculate the prime factors of 28657 and 28665.

Prime Factorization of 28657

Prime Factorization of 28665

Now multiplying the highest exponent prime factors to calculate the LCM of 28657 and 28665.

LCM(28657,28665) = 28657¹ × 3² × 5¹ × 7² × 13¹
LCM(28657,28665) = 821452905