648408020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2493877}}^1$

素因数の和:2493899

約数の個数: 24

約数和(自身を含む): 1466400264

約数和(自身を除く): 817992244

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2493877, 4987754, 9975508, 12469385, 24938770, 32420401, 49877540, 64840802, 129681604, 162102005, 324204010, 648408020]

約数ペア:

[(1, 648408020), (2, 324204010), (4, 162102005), (5, 129681604), (10, 64840802), (13, 49877540), (20, 32420401), (26, 24938770), (52, 12469385), (65, 9975508), (130, 4987754), (260, 2493877)]