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
-
Remove any row in which a NaN appears
8769 Solvers
-
Back to basics 12 - Input Arguments
620 Solvers
-
Chebyshev polynomials of the 1st Kind
79 Solvers
-
50 Solvers
-
Determinant without using det()
66 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!