Divisor-sum convolution identity of weights four and eight

The identity

E_{8} = E_{4}^{2}

gives

σ_{7} (n) = σ_{3} (n) + 120 \sum_{i = 1}^{n - 1} σ_{3} (i) σ_{3} (n - i) .

 Ancestors (8)

 Incoming links (1)

Past exam of the mathematics course of the University of Cambridge / 2021 / iii / Paper 137 / 1 / d / Solution

 View article source

 Discussion (0)

There are no discussions about this article yet.

 Articles by others on the same topic (0)

There are currently no matching articles.

  See all articles in the same topic Create my own version