9990999

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:256

約数の個数: 32

約数和(自身を含む): 15522240

約数和(自身を除く): 5531241

約数列:

[1, 3, 9, 27, 37, 73, 111, 137, 219, 333, 411, 657, 999, 1233, 1971, 2701, 3699, 5069, 8103, 10001, 15207, 24309, 30003, 45621, 72927, 90009, 136863, 270027, 370037, 1110111, 3330333, 9990999]

約数ペア:

[(1, 9990999), (3, 3330333), (9, 1110111), (27, 370037), (37, 270027), (73, 136863), (111, 90009), (137, 72927), (219, 45621), (333, 30003), (411, 24309), (657, 15207), (999, 10001), (1233, 8103), (1971, 5069), (2701, 3699)]