20400015

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2309}}^1$

素因数の和:2367

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 15081585

約数列:

[1, 3, 5, 15, 19, 31, 57, 93, 95, 155, 285, 465, 589, 1767, 2309, 2945, 6927, 8835, 11545, 34635, 43871, 71579, 131613, 214737, 219355, 357895, 658065, 1073685, 1360001, 4080003, 6800005, 20400015]

約数ペア:

[(1, 20400015), (3, 6800005), (5, 4080003), (15, 1360001), (19, 1073685), (31, 658065), (57, 357895), (93, 219355), (95, 214737), (155, 131613), (285, 71579), (465, 43871), (589, 34635), (1767, 11545), (2309, 8835), (2945, 6927)]