20495215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4441}}^1$

素因数の和:4530

約数の個数: 16

約数和(自身を含む): 26865216

約数和(自身を除く): 6370001

約数列:

[1, 5, 13, 65, 71, 355, 923, 4441, 4615, 22205, 57733, 288665, 315311, 1576555, 4099043, 20495215]

約数ペア:

[(1, 20495215), (5, 4099043), (13, 1576555), (65, 315311), (71, 288665), (355, 57733), (923, 22205), (4441, 4615)]