21131705

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{739}}^1$

素因数の和:813

約数の個数: 32

約数和(自身を含む): 31257600

約数和(自身を除く): 10125895

約数列:

[1, 5, 7, 19, 35, 43, 95, 133, 215, 301, 665, 739, 817, 1505, 3695, 4085, 5173, 5719, 14041, 25865, 28595, 31777, 70205, 98287, 158885, 222439, 491435, 603763, 1112195, 3018815, 4226341, 21131705]

約数ペア:

[(1, 21131705), (5, 4226341), (7, 3018815), (19, 1112195), (35, 603763), (43, 491435), (95, 222439), (133, 158885), (215, 98287), (301, 70205), (665, 31777), (739, 28595), (817, 25865), (1505, 14041), (3695, 5719), (4085, 5173)]