17981964

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:540

約数の個数: 144

約数和(自身を含む): 61152000

約数和(自身を除く): 43170036

約数列:

[1, 2, 3, 4, 6, 7, 9, 11, 12, 13, 14, 18, 21, 22, 26, 28, 33, 36, 39, 42, 44, 52, 63, 66, 77, 78, 84, 91, 99, 117, 126, 132, 143, 154, 156, 182, 198, 231, 234, 252, 273, 286, 308, 364, 396, 429, 462, 468, 499, 546, 572, 693, 819, 858, 924, 998, 1001, 1092, 1287, 1386, 1497, 1638, 1716, 1996, 2002, 2574, 2772, 2994, 3003, 3276, 3493, 4004, 4491, 5148, 5489, 5988, 6006, 6487, 6986, 8982, 9009, 10479, 10978, 12012, 12974, 13972, 16467, 17964, 18018, 19461, 20958, 21956, 25948, 31437, 32934, 36036, 38423, 38922, 41916, 45409, 49401, 58383, 62874, 65868, 71357, 76846, 77844, 90818, 98802, 115269, 116766, 125748, 136227, 142714, 153692, 181636, 197604, 214071, 230538, 233532, 272454, 285428, 345807, 408681, 428142, 461076, 499499, 544908, 642213, 691614, 817362, 856284, 998998, 1284426, 1383228, 1498497, 1634724, 1997996, 2568852, 2996994, 4495491, 5993988, 8990982, 17981964]

約数ペア:

[(1, 17981964), (2, 8990982), (3, 5993988), (4, 4495491), (6, 2996994), (7, 2568852), (9, 1997996), (11, 1634724), (12, 1498497), (13, 1383228), (14, 1284426), (18, 998998), (21, 856284), (22, 817362), (26, 691614), (28, 642213), (33, 544908), (36, 499499), (39, 461076), (42, 428142), (44, 408681), (52, 345807), (63, 285428), (66, 272454), (77, 233532), (78, 230538), (84, 214071), (91, 197604), (99, 181636), (117, 153692), (126, 142714), (132, 136227), (143, 125748), (154, 116766), (156, 115269), (182, 98802), (198, 90818), (231, 77844), (234, 76846), (252, 71357), (273, 65868), (286, 62874), (308, 58383), (364, 49401), (396, 45409), (429, 41916), (462, 38922), (468, 38423), (499, 36036), (546, 32934), (572, 31437), (693, 25948), (819, 21956), (858, 20958), (924, 19461), (998, 18018), (1001, 17964), (1092, 16467), (1287, 13972), (1386, 12974), (1497, 12012), (1638, 10978), (1716, 10479), (1996, 9009), (2002, 8982), (2574, 6986), (2772, 6487), (2994, 6006), (3003, 5988), (3276, 5489), (3493, 5148), (4004, 4491)]