261956485

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 398449152

約数和(自身を除く): 136492667

約数列:

[1, 5, 7, 17, 35, 37, 73, 85, 119, 163, 185, 259, 365, 511, 595, 629, 815, 1141, 1241, 1295, 2555, 2701, 2771, 3145, 4403, 5705, 6031, 6205, 8687, 11899, 13505, 13855, 18907, 19397, 22015, 30155, 42217, 43435, 45917, 59495, 83293, 94535, 96985, 102527, 202283, 211085, 229585, 321419, 416465, 440263, 512635, 717689, 1011415, 1415981, 1607095, 2201315, 3081841, 3588445, 7079905, 7484471, 15409205, 37422355, 52391297, 261956485]

約数ペア:

[(1, 261956485), (5, 52391297), (7, 37422355), (17, 15409205), (35, 7484471), (37, 7079905), (73, 3588445), (85, 3081841), (119, 2201315), (163, 1607095), (185, 1415981), (259, 1011415), (365, 717689), (511, 512635), (595, 440263), (629, 416465), (815, 321419), (1141, 229585), (1241, 211085), (1295, 202283), (2555, 102527), (2701, 96985), (2771, 94535), (3145, 83293), (4403, 59495), (5705, 45917), (6031, 43435), (6205, 42217), (8687, 30155), (11899, 22015), (13505, 19397), (13855, 18907)]