99990909

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1138

約数の個数: 32

約数和(自身を含む): 153799680

約数和(自身を除く): 53808771

約数列:

[1, 3, 9, 27, 37, 101, 111, 303, 333, 909, 991, 999, 2727, 2973, 3737, 8919, 11211, 26757, 33633, 36667, 100091, 100899, 110001, 300273, 330003, 900819, 990009, 2702457, 3703367, 11110101, 33330303, 99990909]

約数ペア:

[(1, 99990909), (3, 33330303), (9, 11110101), (27, 3703367), (37, 2702457), (101, 990009), (111, 900819), (303, 330003), (333, 300273), (909, 110001), (991, 100899), (999, 100091), (2727, 36667), (2973, 33633), (3737, 26757), (8919, 11211)]