18873981

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{7307}}^1$

素因数の和:7361

約数の個数: 24

約数和(自身を含む): 31921344

約数和(自身を除く): 13047363

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 7307, 21921, 51149, 65763, 153447, 299587, 460341, 898761, 2097109, 2696283, 6291327, 18873981]

約数ペア:

[(1, 18873981), (3, 6291327), (7, 2696283), (9, 2097109), (21, 898761), (41, 460341), (63, 299587), (123, 153447), (287, 65763), (369, 51149), (861, 21921), (2583, 7307)]