21577521

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1319}}^1$

素因数の和:1389

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 13904079

約数列:

[1, 3, 7, 19, 21, 41, 57, 123, 133, 287, 399, 779, 861, 1319, 2337, 3957, 5453, 9233, 16359, 25061, 27699, 54079, 75183, 162237, 175427, 378553, 526281, 1027501, 1135659, 3082503, 7192507, 21577521]

約数ペア:

[(1, 21577521), (3, 7192507), (7, 3082503), (19, 1135659), (21, 1027501), (41, 526281), (57, 378553), (123, 175427), (133, 162237), (287, 75183), (399, 54079), (779, 27699), (861, 25061), (1319, 16359), (2337, 9233), (3957, 5453)]