261262287

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{431}}^1$

素因数の和:621

約数の個数: 64

約数和(自身を含む): 458680320

約数和(自身を除く): 197418033

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 99, 117, 143, 157, 297, 351, 429, 431, 471, 1287, 1293, 1413, 1727, 2041, 3861, 3879, 4239, 4741, 5181, 5603, 6123, 11637, 14223, 15543, 16809, 18369, 22451, 42669, 46629, 50427, 55107, 61633, 67353, 67667, 128007, 151281, 184899, 202059, 203001, 554697, 606177, 609003, 744337, 879671, 1664091, 1827009, 2233011, 2639013, 6699033, 7917039, 9676381, 20097099, 23751117, 29029143, 87087429, 261262287]

約数ペア:

[(1, 261262287), (3, 87087429), (9, 29029143), (11, 23751117), (13, 20097099), (27, 9676381), (33, 7917039), (39, 6699033), (99, 2639013), (117, 2233011), (143, 1827009), (157, 1664091), (297, 879671), (351, 744337), (429, 609003), (431, 606177), (471, 554697), (1287, 203001), (1293, 202059), (1413, 184899), (1727, 151281), (2041, 128007), (3861, 67667), (3879, 67353), (4239, 61633), (4741, 55107), (5181, 50427), (5603, 46629), (6123, 42669), (11637, 22451), (14223, 18369), (15543, 16809)]