21707816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208729}}^1$

素因数の和:208748

約数の個数: 16

約数和(自身を含む): 43833300

約数和(自身を除く): 22125484

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208729, 417458, 834916, 1669832, 2713477, 5426954, 10853908, 21707816]

約数ペア:

[(1, 21707816), (2, 10853908), (4, 5426954), (8, 2713477), (13, 1669832), (26, 834916), (52, 417458), (104, 208729)]