205920208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{990001}}^1$

素因数の和:990022

約数の個数: 20

約数和(自身を含む): 429660868

約数和(自身を除く): 223740660

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 990001, 1980002, 3960004, 7920008, 12870013, 15840016, 25740026, 51480052, 102960104, 205920208]

約数ペア:

[(1, 205920208), (2, 102960104), (4, 51480052), (8, 25740026), (13, 15840016), (16, 12870013), (26, 7920008), (52, 3960004), (104, 1980002), (208, 990001)]