81293220

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{389}}^1$

素因数の和:456

約数の個数: 144

約数和(自身を含む): 262342080

約数和(自身を除く): 181048860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 43, 45, 54, 60, 81, 86, 90, 108, 129, 135, 162, 172, 180, 215, 243, 258, 270, 324, 387, 389, 405, 430, 486, 516, 540, 645, 774, 778, 810, 860, 972, 1161, 1167, 1215, 1290, 1548, 1556, 1620, 1935, 1945, 2322, 2334, 2430, 2580, 3483, 3501, 3870, 3890, 4644, 4668, 4860, 5805, 5835, 6966, 7002, 7740, 7780, 10449, 10503, 11610, 11670, 13932, 14004, 16727, 17415, 17505, 20898, 21006, 23220, 23340, 31509, 33454, 34830, 35010, 41796, 42012, 50181, 52245, 52515, 63018, 66908, 69660, 70020, 83635, 94527, 100362, 104490, 105030, 126036, 150543, 157545, 167270, 189054, 200724, 208980, 210060, 250905, 301086, 315090, 334540, 378108, 451629, 472635, 501810, 602172, 630180, 752715, 903258, 945270, 1003620, 1354887, 1505430, 1806516, 1890540, 2258145, 2709774, 3010860, 4064661, 4516290, 5419548, 6774435, 8129322, 9032580, 13548870, 16258644, 20323305, 27097740, 40646610, 81293220]

約数ペア:

[(1, 81293220), (2, 40646610), (3, 27097740), (4, 20323305), (5, 16258644), (6, 13548870), (9, 9032580), (10, 8129322), (12, 6774435), (15, 5419548), (18, 4516290), (20, 4064661), (27, 3010860), (30, 2709774), (36, 2258145), (43, 1890540), (45, 1806516), (54, 1505430), (60, 1354887), (81, 1003620), (86, 945270), (90, 903258), (108, 752715), (129, 630180), (135, 602172), (162, 501810), (172, 472635), (180, 451629), (215, 378108), (243, 334540), (258, 315090), (270, 301086), (324, 250905), (387, 210060), (389, 208980), (405, 200724), (430, 189054), (486, 167270), (516, 157545), (540, 150543), (645, 126036), (774, 105030), (778, 104490), (810, 100362), (860, 94527), (972, 83635), (1161, 70020), (1167, 69660), (1215, 66908), (1290, 63018), (1548, 52515), (1556, 52245), (1620, 50181), (1935, 42012), (1945, 41796), (2322, 35010), (2334, 34830), (2430, 33454), (2580, 31509), (3483, 23340), (3501, 23220), (3870, 21006), (3890, 20898), (4644, 17505), (4668, 17415), (4860, 16727), (5805, 14004), (5835, 13932), (6966, 11670), (7002, 11610), (7740, 10503), (7780, 10449)]