28409760

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:311

約数の個数: 144

約数和(自身を含む): 98378280

約数和(自身を除く): 69968520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 109, 120, 144, 160, 180, 181, 218, 240, 288, 327, 360, 362, 436, 480, 543, 545, 654, 720, 724, 872, 905, 981, 1086, 1090, 1308, 1440, 1448, 1629, 1635, 1744, 1810, 1962, 2172, 2180, 2616, 2715, 2896, 3258, 3270, 3488, 3620, 3924, 4344, 4360, 4905, 5232, 5430, 5792, 6516, 6540, 7240, 7848, 8145, 8688, 8720, 9810, 10464, 10860, 13032, 13080, 14480, 15696, 16290, 17376, 17440, 19620, 19729, 21720, 26064, 26160, 28960, 31392, 32580, 39240, 39458, 43440, 52128, 52320, 59187, 65160, 78480, 78916, 86880, 98645, 118374, 130320, 156960, 157832, 177561, 197290, 236748, 260640, 295935, 315664, 355122, 394580, 473496, 591870, 631328, 710244, 789160, 887805, 946992, 1183740, 1420488, 1578320, 1775610, 1893984, 2367480, 2840976, 3156640, 3551220, 4734960, 5681952, 7102440, 9469920, 14204880, 28409760]

約数ペア:

[(1, 28409760), (2, 14204880), (3, 9469920), (4, 7102440), (5, 5681952), (6, 4734960), (8, 3551220), (9, 3156640), (10, 2840976), (12, 2367480), (15, 1893984), (16, 1775610), (18, 1578320), (20, 1420488), (24, 1183740), (30, 946992), (32, 887805), (36, 789160), (40, 710244), (45, 631328), (48, 591870), (60, 473496), (72, 394580), (80, 355122), (90, 315664), (96, 295935), (109, 260640), (120, 236748), (144, 197290), (160, 177561), (180, 157832), (181, 156960), (218, 130320), (240, 118374), (288, 98645), (327, 86880), (360, 78916), (362, 78480), (436, 65160), (480, 59187), (543, 52320), (545, 52128), (654, 43440), (720, 39458), (724, 39240), (872, 32580), (905, 31392), (981, 28960), (1086, 26160), (1090, 26064), (1308, 21720), (1440, 19729), (1448, 19620), (1629, 17440), (1635, 17376), (1744, 16290), (1810, 15696), (1962, 14480), (2172, 13080), (2180, 13032), (2616, 10860), (2715, 10464), (2896, 9810), (3258, 8720), (3270, 8688), (3488, 8145), (3620, 7848), (3924, 7240), (4344, 6540), (4360, 6516), (4905, 5792), (5232, 5430)]