4005665

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:680

約数の個数: 16

約数和(自身を含む): 5085696

約数和(自身を除く): 1080031

約数列:

[1, 5, 31, 43, 155, 215, 601, 1333, 3005, 6665, 18631, 25843, 93155, 129215, 801133, 4005665]

約数ペア:

[(1, 4005665), (5, 801133), (31, 129215), (43, 93155), (155, 25843), (215, 18631), (601, 6665), (1333, 3005)]