20531511

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:133

約数の個数: 96

約数和(自身を含む): 41513472

約数和(自身を除く): 20981961

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 43, 53, 63, 77, 91, 99, 117, 129, 143, 159, 231, 273, 301, 371, 387, 429, 473, 477, 559, 583, 689, 693, 819, 903, 1001, 1113, 1287, 1419, 1677, 1749, 2067, 2279, 2709, 3003, 3311, 3339, 3913, 4081, 4257, 4823, 5031, 5247, 6149, 6201, 6837, 7579, 9009, 9933, 11739, 12243, 14469, 15953, 18447, 20511, 22737, 25069, 29627, 29799, 35217, 36729, 43043, 43407, 47859, 53053, 55341, 68211, 75207, 88881, 129129, 143577, 159159, 175483, 207389, 225621, 266643, 325897, 387387, 477477, 526449, 622167, 977691, 1579347, 1866501, 2281279, 2933073, 6843837, 20531511]

約数ペア:

[(1, 20531511), (3, 6843837), (7, 2933073), (9, 2281279), (11, 1866501), (13, 1579347), (21, 977691), (33, 622167), (39, 526449), (43, 477477), (53, 387387), (63, 325897), (77, 266643), (91, 225621), (99, 207389), (117, 175483), (129, 159159), (143, 143577), (159, 129129), (231, 88881), (273, 75207), (301, 68211), (371, 55341), (387, 53053), (429, 47859), (473, 43407), (477, 43043), (559, 36729), (583, 35217), (689, 29799), (693, 29627), (819, 25069), (903, 22737), (1001, 20511), (1113, 18447), (1287, 15953), (1419, 14469), (1677, 12243), (1749, 11739), (2067, 9933), (2279, 9009), (2709, 7579), (3003, 6837), (3311, 6201), (3339, 6149), (3913, 5247), (4081, 5031), (4257, 4823)]