21105292

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{405871}}^1$

素因数の和:405888

約数の個数: 12

約数和(自身を含む): 39775456

約数和(自身を除く): 18670164

約数列:

[1, 2, 4, 13, 26, 52, 405871, 811742, 1623484, 5276323, 10552646, 21105292]

約数ペア:

[(1, 21105292), (2, 10552646), (4, 5276323), (13, 1623484), (26, 811742), (52, 405871)]