A k-hyperperfect number is a natural number n for which the equality n = 1 + k(σ(n) − n − 1) holds, where σ(n) is the divisor function (i.e., the sum of all positive divisors of n).
%Example
sigma(6) = 1 + 2 + 3 + 6 = 12
%for k=1
1 + 1*(12-6-1) = 1 + 5 = 6
%Example
sigma(325) = 1 + 5 + 13 + 25 + 65 + 325 = 434
%for k=3
1 + 3*(434-325-1) = 1 + 3*108 = 324
Given a number x, return the xth Hyperperfect number (serial/order wise) and corresponding k value.
P.S - Check the test suite for banned functions. More functions might be added later to prevent hard coded solutions.
Solution Stats
Problem Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers3
Suggested Problems
-
Replace NaNs with the number that appears to its left in the row.
3065 Solvers
-
Make an awesome ramp for a tiny motorcycle stuntman
750 Solvers
-
Set some matrix elements to zero
626 Solvers
-
We love vectorized solutions. Problem 1 : remove the row average.
884 Solvers
-
123 Solvers
More from this Author44
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!