Problem 57288. Sum the unitary divisors of a number

Cody Problems 1933 and 46898 deal with sigma(n), the sum of divisors function. This problem deals with sigma*(n), the sum of unitary divisors functions. Unitary divisors are defined in Cody Problem 56738, which asks for a list of the unitary divisors of a number, and they appear in Cody Problem 56743, which asks for a count.
Write a function to sum the unitary divisors of a number. For example, the unitary divisors of 18 are 1, 2, 9, and 18; therefore, the sum is 30.
Solve

Solution Stats

90.0% Correct | 10.0% Incorrect
Last Solution submitted on Jun 23, 2024

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers9

Suggested Problems

More from this Author281

Problem Tags

number theory sequence

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!