28209720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:146

約数の個数: 256

約数和(自身を含む): 109486080

約数和(自身を除く): 81276360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 20, 21, 22, 24, 28, 30, 33, 35, 40, 42, 43, 44, 55, 56, 60, 66, 70, 71, 77, 84, 86, 88, 105, 110, 120, 129, 132, 140, 142, 154, 165, 168, 172, 210, 213, 215, 220, 231, 258, 264, 280, 284, 301, 308, 330, 344, 355, 385, 420, 426, 430, 440, 462, 473, 497, 516, 568, 602, 616, 645, 660, 710, 770, 781, 840, 852, 860, 903, 924, 946, 994, 1032, 1065, 1155, 1204, 1290, 1320, 1419, 1420, 1491, 1505, 1540, 1562, 1704, 1720, 1806, 1848, 1892, 1988, 2130, 2310, 2343, 2365, 2408, 2485, 2580, 2838, 2840, 2982, 3010, 3053, 3080, 3124, 3311, 3612, 3784, 3905, 3976, 4260, 4515, 4620, 4686, 4730, 4970, 5160, 5467, 5676, 5964, 6020, 6106, 6248, 6622, 7095, 7224, 7455, 7810, 8520, 9030, 9159, 9240, 9372, 9460, 9933, 9940, 10934, 11352, 11715, 11928, 12040, 12212, 13244, 14190, 14910, 15265, 15620, 16401, 16555, 18060, 18318, 18744, 18920, 19866, 19880, 21371, 21868, 23430, 24424, 26488, 27335, 28380, 29820, 30530, 31240, 32802, 33110, 33583, 36120, 36636, 39732, 42742, 43736, 45795, 46860, 49665, 54670, 56760, 59640, 61060, 64113, 65604, 66220, 67166, 73272, 79464, 82005, 85484, 91590, 93720, 99330, 100749, 106855, 109340, 122120, 128226, 131208, 132440, 134332, 164010, 167915, 170968, 183180, 198660, 201498, 213710, 218680, 235081, 256452, 268664, 320565, 328020, 335830, 366360, 397320, 402996, 427420, 470162, 503745, 512904, 641130, 656040, 671660, 705243, 805992, 854840, 940324, 1007490, 1175405, 1282260, 1343320, 1410486, 1880648, 2014980, 2350810, 2564520, 2820972, 3526215, 4029960, 4701620, 5641944, 7052430, 9403240, 14104860, 28209720]

約数ペア:

[(1, 28209720), (2, 14104860), (3, 9403240), (4, 7052430), (5, 5641944), (6, 4701620), (7, 4029960), (8, 3526215), (10, 2820972), (11, 2564520), (12, 2350810), (14, 2014980), (15, 1880648), (20, 1410486), (21, 1343320), (22, 1282260), (24, 1175405), (28, 1007490), (30, 940324), (33, 854840), (35, 805992), (40, 705243), (42, 671660), (43, 656040), (44, 641130), (55, 512904), (56, 503745), (60, 470162), (66, 427420), (70, 402996), (71, 397320), (77, 366360), (84, 335830), (86, 328020), (88, 320565), (105, 268664), (110, 256452), (120, 235081), (129, 218680), (132, 213710), (140, 201498), (142, 198660), (154, 183180), (165, 170968), (168, 167915), (172, 164010), (210, 134332), (213, 132440), (215, 131208), (220, 128226), (231, 122120), (258, 109340), (264, 106855), (280, 100749), (284, 99330), (301, 93720), (308, 91590), (330, 85484), (344, 82005), (355, 79464), (385, 73272), (420, 67166), (426, 66220), (430, 65604), (440, 64113), (462, 61060), (473, 59640), (497, 56760), (516, 54670), (568, 49665), (602, 46860), (616, 45795), (645, 43736), (660, 42742), (710, 39732), (770, 36636), (781, 36120), (840, 33583), (852, 33110), (860, 32802), (903, 31240), (924, 30530), (946, 29820), (994, 28380), (1032, 27335), (1065, 26488), (1155, 24424), (1204, 23430), (1290, 21868), (1320, 21371), (1419, 19880), (1420, 19866), (1491, 18920), (1505, 18744), (1540, 18318), (1562, 18060), (1704, 16555), (1720, 16401), (1806, 15620), (1848, 15265), (1892, 14910), (1988, 14190), (2130, 13244), (2310, 12212), (2343, 12040), (2365, 11928), (2408, 11715), (2485, 11352), (2580, 10934), (2838, 9940), (2840, 9933), (2982, 9460), (3010, 9372), (3053, 9240), (3080, 9159), (3124, 9030), (3311, 8520), (3612, 7810), (3784, 7455), (3905, 7224), (3976, 7095), (4260, 6622), (4515, 6248), (4620, 6106), (4686, 6020), (4730, 5964), (4970, 5676), (5160, 5467)]