Skip to content

Erdős problem 412

Let σ1(n)=σ(n)σ_1(n)=σ(n), the sum of divisors function, and σk(n)=σ(σk1(n))σ_k(n) = σ(σ_{k-1}(n)). Is it true that, for every m,n2m, n ≥ 2, there exist some i,ji, j such that σi(m)=σj(n)σ_i(m) = σ_j(n)?

Workspace

Open this exact Problem, source revision, and authority Repository in Workbench. This handoff does not clone, switch, upload, or execute anything.

Canvas

public preview
  1. Source#412
  2. ResultNone
  3. Checks0

Search problems.science

Find a Problem, Result, source, or page