810081

素因数分解:

$3^4\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:222

約数の個数: 20

約数和(自身を含む): 1235652

約数和(自身を除く): 425571

約数列:

[1, 3, 9, 27, 73, 81, 137, 219, 411, 657, 1233, 1971, 3699, 5913, 10001, 11097, 30003, 90009, 270027, 810081]

約数ペア:

[(1, 810081), (3, 270027), (9, 90009), (27, 30003), (73, 11097), (81, 10001), (137, 5913), (219, 3699), (411, 1971), (657, 1233)]