21216208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102001}}^1$

素因数の和:102022

約数の個数: 20

約数和(自身を含む): 44268868

約数和(自身を除く): 23052660

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102001, 204002, 408004, 816008, 1326013, 1632016, 2652026, 5304052, 10608104, 21216208]

約数ペア:

[(1, 21216208), (2, 10608104), (4, 5304052), (8, 2652026), (13, 1632016), (16, 1326013), (26, 816008), (52, 408004), (104, 204002), (208, 102001)]