Question 1172317
.


The post is written incorrectly.



Had the post be written correctly,  d(n)  would be a finite product, and  d(n)  would be called  (be referred) 

as the number of divisors of the number  n, including 1 and the number n itself.



See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/divisibility/lessons/Problems-on-divisors-of-a-given-number.lesson>Problems on divisors of a given number</A> 

in this site.