Arithmetical functions problem in Homework Help Posted August 31, 2020 · Edited August 31, 2020 by sun3000 Prove: $$ \sigma _1 (n) = \sum_{d|n} \varphi(d) \sigma_0 \left( \frac{n}{d} \right)$$ 0
Arithmetical functions problem
in Homework Help
Posted · Edited by sun3000
Prove: $$ \sigma _1 (n) = \sum_{d|n} \varphi(d) \sigma_0 \left( \frac{n}{d} \right)$$