20211555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1$

素因数の和:125

約数の個数: 96

約数和(自身を含む): 43006464

約数和(自身を除く): 22794909

約数列:

[1, 3, 5, 7, 13, 15, 17, 21, 35, 39, 51, 65, 67, 85, 91, 105, 119, 169, 195, 201, 221, 255, 273, 335, 357, 455, 469, 507, 595, 663, 845, 871, 1005, 1105, 1139, 1183, 1365, 1407, 1547, 1785, 2345, 2535, 2613, 2873, 3315, 3417, 3549, 4355, 4641, 5695, 5915, 6097, 7035, 7735, 7973, 8619, 11323, 13065, 14365, 14807, 17085, 17745, 18291, 20111, 23205, 23919, 30485, 33969, 39865, 43095, 44421, 56615, 60333, 74035, 79261, 91455, 100555, 103649, 119595, 169845, 192491, 222105, 237783, 301665, 310947, 396305, 518245, 577473, 962455, 1188915, 1347437, 1554735, 2887365, 4042311, 6737185, 20211555]

約数ペア:

[(1, 20211555), (3, 6737185), (5, 4042311), (7, 2887365), (13, 1554735), (15, 1347437), (17, 1188915), (21, 962455), (35, 577473), (39, 518245), (51, 396305), (65, 310947), (67, 301665), (85, 237783), (91, 222105), (105, 192491), (119, 169845), (169, 119595), (195, 103649), (201, 100555), (221, 91455), (255, 79261), (273, 74035), (335, 60333), (357, 56615), (455, 44421), (469, 43095), (507, 39865), (595, 33969), (663, 30485), (845, 23919), (871, 23205), (1005, 20111), (1105, 18291), (1139, 17745), (1183, 17085), (1365, 14807), (1407, 14365), (1547, 13065), (1785, 11323), (2345, 8619), (2535, 7973), (2613, 7735), (2873, 7035), (3315, 6097), (3417, 5915), (3549, 5695), (4355, 4641)]