78821991

素因数分解:

$3^4\times {\mathrm{137}}^1\times {\mathrm{7103}}^1$

素因数の和:7252

約数の個数: 20

約数和(自身を含む): 118622592

約数和(自身を除く): 39800601

約数列:

[1, 3, 9, 27, 81, 137, 411, 1233, 3699, 7103, 11097, 21309, 63927, 191781, 575343, 973111, 2919333, 8757999, 26273997, 78821991]

約数ペア:

[(1, 78821991), (3, 26273997), (9, 8757999), (27, 2919333), (81, 973111), (137, 575343), (411, 191781), (1233, 63927), (3699, 21309), (7103, 11097)]