21388029

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{4003}}^1$

素因数の和:4156

約数の個数: 16

約数和(自身を含む): 30942912

約数和(自身を除く): 9554883

約数列:

[1, 3, 13, 39, 137, 411, 1781, 4003, 5343, 12009, 52039, 156117, 548411, 1645233, 7129343, 21388029]

約数ペア:

[(1, 21388029), (3, 7129343), (13, 1645233), (39, 548411), (137, 156117), (411, 52039), (1781, 12009), (4003, 5343)]