21000261776

素因数分解:

$2^4\times {\mathrm{13}}^3\times {\mathrm{283}}^1\times {\mathrm{2111}}^1$

素因数の和:2441

約数の個数: 80

約数和(自身を含む): 44253834240

約数和(自身を除く): 23253572464

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 169, 208, 283, 338, 566, 676, 1132, 1352, 2111, 2197, 2264, 2704, 3679, 4222, 4394, 4528, 7358, 8444, 8788, 14716, 16888, 17576, 27443, 29432, 33776, 35152, 47827, 54886, 58864, 95654, 109772, 191308, 219544, 356759, 382616, 439088, 597413, 621751, 713518, 765232, 1194826, 1243502, 1427036, 2389652, 2487004, 2854072, 4637867, 4779304, 4974008, 5708144, 7766369, 9275734, 9558608, 9948016, 15532738, 18551468, 31065476, 37102936, 62130952, 74205872, 100962797, 124261904, 201925594, 403851188, 807702376, 1312516361, 1615404752, 2625032722, 5250065444, 10500130888, 21000261776]

約数ペア:

[(1, 21000261776), (2, 10500130888), (4, 5250065444), (8, 2625032722), (13, 1615404752), (16, 1312516361), (26, 807702376), (52, 403851188), (104, 201925594), (169, 124261904), (208, 100962797), (283, 74205872), (338, 62130952), (566, 37102936), (676, 31065476), (1132, 18551468), (1352, 15532738), (2111, 9948016), (2197, 9558608), (2264, 9275734), (2704, 7766369), (3679, 5708144), (4222, 4974008), (4394, 4779304), (4528, 4637867), (7358, 2854072), (8444, 2487004), (8788, 2389652), (14716, 1427036), (16888, 1243502), (17576, 1194826), (27443, 765232), (29432, 713518), (33776, 621751), (35152, 597413), (47827, 439088), (54886, 382616), (58864, 356759), (95654, 219544), (109772, 191308)]