Solve the arithmetic differential equation D(n) = n - MATLAB Cody - MATLAB Central

Problem 49733. Solve the arithmetic differential equation D(n) = n

Difficulty:
(64)
Rate
Cody Problem 47843 involved the arithmetic derivative of integers. In particular, D(p) = 1 if p is prime and D(mn) = n D(m) + m D(n). Therefore, the arithmetic derivatives of 1, 2, 3, 4, 5, and 6 are 0, 1, 1, 4, 1, and 5, respectively.
One might then ask about solving arithmetic differential equations (ADEs). Because the study of differential equations often starts with solving dy/dx = y, let’s consider the analogous ADE D(n) = n. The definition of the arithmetic derivative shows that no prime can solve this equation, but the sample calculations above show that the first (i.e., m = 1) solution is 4.
Write a function to compute the mth solution to this ADE. Because the solutions become large quickly, return the logarithm of the solution.
Solve

Solution Stats

37.14% Correct | 62.86% Incorrect
Last Solution submitted on Sep 14, 2024

Solution Comments

Show comments
Registration Now Open for MathWorks AUTOMOTIVE CONFERENCE 2025
...
Hello Community, We're excited to announce that registration is now open for the...

Problem Recent Solvers11

Suggested Problems

More from this Author292

Community Treasure Hunt

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

Start Hunting!
Go to top of page