18979920

素因数分解:

$2^4\times 3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:155

約数の個数: 200

約数和(自身を含む): 68868360

約数和(自身を除く): 49888440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 29, 30, 36, 40, 45, 48, 54, 58, 60, 72, 80, 81, 87, 90, 101, 108, 116, 120, 135, 144, 145, 162, 174, 180, 202, 216, 232, 240, 261, 270, 290, 303, 324, 348, 360, 404, 405, 432, 435, 464, 505, 522, 540, 580, 606, 648, 696, 720, 783, 808, 810, 870, 909, 1010, 1044, 1080, 1160, 1212, 1296, 1305, 1392, 1515, 1566, 1616, 1620, 1740, 1818, 2020, 2088, 2160, 2320, 2349, 2424, 2610, 2727, 2929, 3030, 3132, 3240, 3480, 3636, 3915, 4040, 4176, 4545, 4698, 4848, 5220, 5454, 5858, 6060, 6264, 6480, 6960, 7272, 7830, 8080, 8181, 8787, 9090, 9396, 10440, 10908, 11716, 11745, 12120, 12528, 13635, 14544, 14645, 15660, 16362, 17574, 18180, 18792, 20880, 21816, 23432, 23490, 24240, 26361, 27270, 29290, 31320, 32724, 35148, 36360, 37584, 40905, 43632, 43935, 46864, 46980, 52722, 54540, 58580, 62640, 65448, 70296, 72720, 79083, 81810, 87870, 93960, 105444, 109080, 117160, 130896, 131805, 140592, 158166, 163620, 175740, 187920, 210888, 218160, 234320, 237249, 263610, 316332, 327240, 351480, 395415, 421776, 474498, 527220, 632664, 654480, 702960, 790830, 948996, 1054440, 1186245, 1265328, 1581660, 1897992, 2108880, 2372490, 3163320, 3795984, 4744980, 6326640, 9489960, 18979920]

約数ペア:

[(1, 18979920), (2, 9489960), (3, 6326640), (4, 4744980), (5, 3795984), (6, 3163320), (8, 2372490), (9, 2108880), (10, 1897992), (12, 1581660), (15, 1265328), (16, 1186245), (18, 1054440), (20, 948996), (24, 790830), (27, 702960), (29, 654480), (30, 632664), (36, 527220), (40, 474498), (45, 421776), (48, 395415), (54, 351480), (58, 327240), (60, 316332), (72, 263610), (80, 237249), (81, 234320), (87, 218160), (90, 210888), (101, 187920), (108, 175740), (116, 163620), (120, 158166), (135, 140592), (144, 131805), (145, 130896), (162, 117160), (174, 109080), (180, 105444), (202, 93960), (216, 87870), (232, 81810), (240, 79083), (261, 72720), (270, 70296), (290, 65448), (303, 62640), (324, 58580), (348, 54540), (360, 52722), (404, 46980), (405, 46864), (432, 43935), (435, 43632), (464, 40905), (505, 37584), (522, 36360), (540, 35148), (580, 32724), (606, 31320), (648, 29290), (696, 27270), (720, 26361), (783, 24240), (808, 23490), (810, 23432), (870, 21816), (909, 20880), (1010, 18792), (1044, 18180), (1080, 17574), (1160, 16362), (1212, 15660), (1296, 14645), (1305, 14544), (1392, 13635), (1515, 12528), (1566, 12120), (1616, 11745), (1620, 11716), (1740, 10908), (1818, 10440), (2020, 9396), (2088, 9090), (2160, 8787), (2320, 8181), (2349, 8080), (2424, 7830), (2610, 7272), (2727, 6960), (2929, 6480), (3030, 6264), (3132, 6060), (3240, 5858), (3480, 5454), (3636, 5220), (3915, 4848), (4040, 4698), (4176, 4545)]