20001665

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{3001}}^1$

素因数の和:3080

約数の個数: 16

約数和(自身を含む): 25360896

約数和(自身を除く): 5359231

約数列:

[1, 5, 31, 43, 155, 215, 1333, 3001, 6665, 15005, 93031, 129043, 465155, 645215, 4000333, 20001665]

約数ペア:

[(1, 20001665), (5, 4000333), (31, 645215), (43, 465155), (155, 129043), (215, 93031), (1333, 15005), (3001, 6665)]