256439960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:158

約数の個数: 192

約数和(自身を含む): 724204800

約数和(自身を除く): 467764840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 43, 56, 59, 70, 76, 86, 95, 118, 133, 140, 152, 172, 190, 215, 236, 266, 280, 295, 301, 344, 361, 380, 413, 430, 472, 532, 590, 602, 665, 722, 760, 817, 826, 860, 1064, 1121, 1180, 1204, 1330, 1444, 1505, 1634, 1652, 1720, 1805, 2065, 2242, 2360, 2408, 2527, 2537, 2660, 2888, 3010, 3268, 3304, 3610, 4085, 4130, 4484, 5054, 5074, 5320, 5605, 5719, 6020, 6536, 7220, 7847, 8170, 8260, 8968, 10108, 10148, 11210, 11438, 12040, 12635, 12685, 14440, 15523, 15694, 16340, 16520, 17759, 20216, 20296, 21299, 22420, 22876, 25270, 25370, 28595, 31046, 31388, 32680, 35518, 39235, 42598, 44840, 45752, 48203, 50540, 50740, 57190, 62092, 62776, 71036, 77615, 78470, 85196, 88795, 96406, 101080, 101480, 106495, 108661, 114380, 124184, 142072, 149093, 155230, 156940, 170392, 177590, 192812, 212990, 217322, 228760, 241015, 298186, 310460, 313880, 337421, 355180, 385624, 425980, 434644, 482030, 543305, 596372, 620920, 674842, 710360, 745465, 851960, 869288, 915857, 964060, 1086610, 1192744, 1349684, 1490930, 1687105, 1831714, 1928120, 2173220, 2699368, 2981860, 3374210, 3663428, 4346440, 4579285, 5963720, 6410999, 6748420, 7326856, 9158570, 12821998, 13496840, 18317140, 25643996, 32054995, 36634280, 51287992, 64109990, 128219980, 256439960]

約数ペア:

[(1, 256439960), (2, 128219980), (4, 64109990), (5, 51287992), (7, 36634280), (8, 32054995), (10, 25643996), (14, 18317140), (19, 13496840), (20, 12821998), (28, 9158570), (35, 7326856), (38, 6748420), (40, 6410999), (43, 5963720), (56, 4579285), (59, 4346440), (70, 3663428), (76, 3374210), (86, 2981860), (95, 2699368), (118, 2173220), (133, 1928120), (140, 1831714), (152, 1687105), (172, 1490930), (190, 1349684), (215, 1192744), (236, 1086610), (266, 964060), (280, 915857), (295, 869288), (301, 851960), (344, 745465), (361, 710360), (380, 674842), (413, 620920), (430, 596372), (472, 543305), (532, 482030), (590, 434644), (602, 425980), (665, 385624), (722, 355180), (760, 337421), (817, 313880), (826, 310460), (860, 298186), (1064, 241015), (1121, 228760), (1180, 217322), (1204, 212990), (1330, 192812), (1444, 177590), (1505, 170392), (1634, 156940), (1652, 155230), (1720, 149093), (1805, 142072), (2065, 124184), (2242, 114380), (2360, 108661), (2408, 106495), (2527, 101480), (2537, 101080), (2660, 96406), (2888, 88795), (3010, 85196), (3268, 78470), (3304, 77615), (3610, 71036), (4085, 62776), (4130, 62092), (4484, 57190), (5054, 50740), (5074, 50540), (5320, 48203), (5605, 45752), (5719, 44840), (6020, 42598), (6536, 39235), (7220, 35518), (7847, 32680), (8170, 31388), (8260, 31046), (8968, 28595), (10108, 25370), (10148, 25270), (11210, 22876), (11438, 22420), (12040, 21299), (12635, 20296), (12685, 20216), (14440, 17759), (15523, 16520), (15694, 16340)]