Definition:Aliquot Sum/Sequence

Sequence of Aliquot Sums
The sequence of aliquot sums begins:


 * $\begin{array} {r|r}

n & \map \sigma n \\ \hline 1 & 0 \\ 2 & 1 \\ 3 & 1 \\ 4 & 3 \\ 5 & 1 \\ 6 & 6 \\ 7 & 1 \\ 8 & 7 \\ 9 & 4 \\ 10 & 8 \\ 11 & 1 \\ 12 & 16 \\ 13 & 1 \\ 14 & 10 \\ 15 & 9 \\ 16 & 15 \end{array}$