21721812

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:321

約数の個数: 96

約数和(自身を含む): 61797120

約数和(自身を除く): 40075308

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 29, 37, 42, 58, 74, 84, 87, 111, 116, 148, 174, 203, 222, 241, 259, 348, 406, 444, 482, 518, 609, 723, 777, 812, 964, 1036, 1073, 1218, 1446, 1554, 1687, 2146, 2436, 2892, 3108, 3219, 3374, 4292, 5061, 6438, 6748, 6989, 7511, 8917, 10122, 12876, 13978, 15022, 17834, 20244, 20967, 22533, 26751, 27956, 30044, 35668, 41934, 45066, 48923, 53502, 62419, 83868, 90132, 97846, 107004, 124838, 146769, 187257, 195692, 249676, 258593, 293538, 374514, 517186, 587076, 749028, 775779, 1034372, 1551558, 1810151, 3103116, 3620302, 5430453, 7240604, 10860906, 21721812]

約数ペア:

[(1, 21721812), (2, 10860906), (3, 7240604), (4, 5430453), (6, 3620302), (7, 3103116), (12, 1810151), (14, 1551558), (21, 1034372), (28, 775779), (29, 749028), (37, 587076), (42, 517186), (58, 374514), (74, 293538), (84, 258593), (87, 249676), (111, 195692), (116, 187257), (148, 146769), (174, 124838), (203, 107004), (222, 97846), (241, 90132), (259, 83868), (348, 62419), (406, 53502), (444, 48923), (482, 45066), (518, 41934), (609, 35668), (723, 30044), (777, 27956), (812, 26751), (964, 22533), (1036, 20967), (1073, 20244), (1218, 17834), (1446, 15022), (1554, 13978), (1687, 12876), (2146, 10122), (2436, 8917), (2892, 7511), (3108, 6989), (3219, 6748), (3374, 6438), (4292, 5061)]