28370875

素因数分解:

$5^3\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1$

素因数の和:137

約数の個数: 48

約数和(自身を含む): 41109120

約数和(自身を除く): 12738245

約数列:

[1, 5, 13, 17, 25, 65, 79, 85, 125, 169, 221, 325, 395, 425, 845, 1027, 1105, 1343, 1625, 1975, 2125, 2873, 4225, 5135, 5525, 6715, 9875, 13351, 14365, 17459, 21125, 25675, 27625, 33575, 66755, 71825, 87295, 128375, 167875, 226967, 333775, 359125, 436475, 1134835, 1668875, 2182375, 5674175, 28370875]

約数ペア:

[(1, 28370875), (5, 5674175), (13, 2182375), (17, 1668875), (25, 1134835), (65, 436475), (79, 359125), (85, 333775), (125, 226967), (169, 167875), (221, 128375), (325, 87295), (395, 71825), (425, 66755), (845, 33575), (1027, 27625), (1105, 25675), (1343, 21125), (1625, 17459), (1975, 14365), (2125, 13351), (2873, 9875), (4225, 6715), (5135, 5525)]