20704528

素因数分解:

$2^4\times {\mathrm{13}}^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:97

約数の個数: 80

約数和(自身を含む): 47219200

約数和(自身を除く): 26514672

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 31, 38, 52, 62, 76, 104, 124, 152, 169, 208, 247, 248, 304, 338, 403, 494, 496, 589, 676, 806, 988, 1178, 1352, 1612, 1976, 2197, 2356, 2704, 3211, 3224, 3952, 4394, 4712, 5239, 6422, 6448, 7657, 8788, 9424, 10478, 12844, 15314, 17576, 20956, 25688, 30628, 35152, 41743, 41912, 51376, 61256, 68107, 83486, 83824, 99541, 122512, 136214, 166972, 199082, 272428, 333944, 398164, 544856, 667888, 796328, 1089712, 1294033, 1592656, 2588066, 5176132, 10352264, 20704528]

約数ペア:

[(1, 20704528), (2, 10352264), (4, 5176132), (8, 2588066), (13, 1592656), (16, 1294033), (19, 1089712), (26, 796328), (31, 667888), (38, 544856), (52, 398164), (62, 333944), (76, 272428), (104, 199082), (124, 166972), (152, 136214), (169, 122512), (208, 99541), (247, 83824), (248, 83486), (304, 68107), (338, 61256), (403, 51376), (494, 41912), (496, 41743), (589, 35152), (676, 30628), (806, 25688), (988, 20956), (1178, 17576), (1352, 15314), (1612, 12844), (1976, 10478), (2197, 9424), (2356, 8788), (2704, 7657), (3211, 6448), (3224, 6422), (3952, 5239), (4394, 4712)]