399888905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{283}}^1\times {\mathrm{21739}}^1$

素因数の和:22040

約数の個数: 16

約数和(自身を含む): 518629440

約数和(自身を除く): 118740535

約数列:

[1, 5, 13, 65, 283, 1415, 3679, 18395, 21739, 108695, 282607, 1413035, 6152137, 30760685, 79977781, 399888905]

約数ペア:

[(1, 399888905), (5, 79977781), (13, 30760685), (65, 6152137), (283, 1413035), (1415, 282607), (3679, 108695), (18395, 21739)]