Erdős problem 250Is ∑n=1∞σ(n)2n \sum_{n=1}^\infty \frac{\sigma(n)}{2^n} irrational? Here σ(n)\sigma(n) is the sum of divisors function.WorkspaceContinue locallyOpen sourceSign in to contributeOpen this exact Problem, source revision, and authority Repository in Workbench. This handoff does not clone, switch, upload, or execute anything.FilesErdős problem 2502 retained source recordsCanvaspublic previewSource#250→ResultNone→Checks0