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 Solvers5
Suggested Problems
-
Back to basics 22 - Rotate a matrix
939 Solvers
-
Flip the main diagonal of a matrix
926 Solvers
-
Compute a dot product of two vectors x and y
1057 Solvers
-
mathematics , probability problem
70 Solvers
-
507 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!