20904208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{100501}}^1$

素因数の和:100522

約数の個数: 20

約数和(自身を含む): 43617868

約数和(自身を除く): 22713660

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 100501, 201002, 402004, 804008, 1306513, 1608016, 2613026, 5226052, 10452104, 20904208]

約数ペア:

[(1, 20904208), (2, 10452104), (4, 5226052), (8, 2613026), (13, 1608016), (16, 1306513), (26, 804008), (52, 402004), (104, 201002), (208, 100501)]