20791782

素因数分解:

$2^1\times 3^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:139

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 35195418

約数列:

[1, 2, 3, 6, 9, 11, 17, 18, 22, 27, 29, 33, 34, 51, 54, 58, 66, 71, 87, 99, 102, 142, 153, 174, 187, 198, 213, 261, 297, 306, 319, 374, 426, 459, 493, 522, 561, 594, 638, 639, 781, 783, 918, 957, 986, 1122, 1207, 1278, 1479, 1562, 1566, 1683, 1914, 1917, 2059, 2343, 2414, 2871, 2958, 3366, 3621, 3834, 4118, 4437, 4686, 5049, 5423, 5742, 6177, 7029, 7242, 8613, 8874, 10098, 10846, 10863, 12354, 13277, 13311, 14058, 16269, 17226, 18531, 21087, 21726, 22649, 26554, 26622, 32538, 32589, 35003, 37062, 39831, 42174, 45298, 48807, 55593, 65178, 67947, 70006, 79662, 97614, 105009, 111186, 119493, 135894, 146421, 203841, 210018, 238986, 292842, 315027, 358479, 385033, 407682, 611523, 630054, 716958, 770066, 945081, 1155099, 1223046, 1890162, 2310198, 3465297, 6930594, 10395891, 20791782]

約数ペア:

[(1, 20791782), (2, 10395891), (3, 6930594), (6, 3465297), (9, 2310198), (11, 1890162), (17, 1223046), (18, 1155099), (22, 945081), (27, 770066), (29, 716958), (33, 630054), (34, 611523), (51, 407682), (54, 385033), (58, 358479), (66, 315027), (71, 292842), (87, 238986), (99, 210018), (102, 203841), (142, 146421), (153, 135894), (174, 119493), (187, 111186), (198, 105009), (213, 97614), (261, 79662), (297, 70006), (306, 67947), (319, 65178), (374, 55593), (426, 48807), (459, 45298), (493, 42174), (522, 39831), (561, 37062), (594, 35003), (638, 32589), (639, 32538), (781, 26622), (783, 26554), (918, 22649), (957, 21726), (986, 21087), (1122, 18531), (1207, 17226), (1278, 16269), (1479, 14058), (1562, 13311), (1566, 13277), (1683, 12354), (1914, 10863), (1917, 10846), (2059, 10098), (2343, 8874), (2414, 8613), (2871, 7242), (2958, 7029), (3366, 6177), (3621, 5742), (3834, 5423), (4118, 5049), (4437, 4686)]