Problem 53125. Easy Sequences 54: Product of Products of Proper Divisors
A divisor of a number that is less than the number is called a "proper divisor".
For a given positive integer n, we are asked to evaluate the following summation:
This is equivalent to finding the product of the products of proper divisors of all integers from 2 to n.
For example for , we have:
Please present your output modulo .
Solution Stats
Problem Comments
-
3 Comments
GeeTwo
on 17 Aug 2023
Really pretty simple, once you figure out which way to run the problem.
GeeTwo
on 19 Aug 2023
It's been two days, but my solution isn't showing up. It is size 37, but it is a real solution, no cheats apart from using an implicit ans to save four points, and an exploit of conversion from logical to numeric yielding 0 or 1. Any clues as to why it isn't showing up?
Christian Schröder
on 20 Aug 2023
@GeeTwo I've had this happen once as well, a week or two ago. Some problem with the Cody servers, perhaps; I ended up resubmitting my solution, and the second one showed up.
Solution Comments
Show commentsProblem Recent Solvers3
Suggested Problems
-
Create array of all Distances between two Sets of Points
41 Solvers
-
268 Solvers
-
55 Solvers
-
159 Solvers
-
219 Solvers
More from this Author116
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!