201991990

素因数分解:

$2^1\times 5^1\times {\mathrm{1039}}^1\times {\mathrm{19441}}^1$

素因数の和:20487

約数の個数: 16

約数和(自身を含む): 363954240

約数和(自身を除く): 161962250

約数列:

[1, 2, 5, 10, 1039, 2078, 5195, 10390, 19441, 38882, 97205, 194410, 20199199, 40398398, 100995995, 201991990]

約数ペア:

[(1, 201991990), (2, 100995995), (5, 40398398), (10, 20199199), (1039, 194410), (2078, 97205), (5195, 38882), (10390, 19441)]