90789820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{1009}}^1$

素因数の和:1438

約数の個数: 48

約数和(自身を含む): 208706400

約数和(自身を除く): 117916580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 409, 818, 1009, 1636, 2018, 2045, 4036, 4090, 4499, 5045, 8180, 8998, 10090, 11099, 17996, 20180, 22198, 22495, 44396, 44990, 55495, 89980, 110990, 221980, 412681, 825362, 1650724, 2063405, 4126810, 4539491, 8253620, 9078982, 18157964, 22697455, 45394910, 90789820]

約数ペア:

[(1, 90789820), (2, 45394910), (4, 22697455), (5, 18157964), (10, 9078982), (11, 8253620), (20, 4539491), (22, 4126810), (44, 2063405), (55, 1650724), (110, 825362), (220, 412681), (409, 221980), (818, 110990), (1009, 89980), (1636, 55495), (2018, 44990), (2045, 44396), (4036, 22495), (4090, 22198), (4499, 20180), (5045, 17996), (8180, 11099), (8998, 10090)]