20290490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:479

約数の個数: 48

約数和(自身を含む): 41224680

約数和(自身を除く): 20934190

約数列:

[1, 2, 5, 10, 11, 22, 41, 55, 82, 110, 121, 205, 242, 409, 410, 451, 605, 818, 902, 1210, 2045, 2255, 4090, 4499, 4510, 4961, 8998, 9922, 16769, 22495, 24805, 33538, 44990, 49489, 49610, 83845, 98978, 167690, 184459, 247445, 368918, 494890, 922295, 1844590, 2029049, 4058098, 10145245, 20290490]

約数ペア:

[(1, 20290490), (2, 10145245), (5, 4058098), (10, 2029049), (11, 1844590), (22, 922295), (41, 494890), (55, 368918), (82, 247445), (110, 184459), (121, 167690), (205, 98978), (242, 83845), (409, 49610), (410, 49489), (451, 44990), (605, 33538), (818, 24805), (902, 22495), (1210, 16769), (2045, 9922), (2255, 8998), (4090, 4961), (4499, 4510)]