256780920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{11443}}^1$

素因数の和:11485

約数の個数: 128

約数和(自身を含む): 889885440

約数和(自身を除く): 633104520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 17, 20, 22, 24, 30, 33, 34, 40, 44, 51, 55, 60, 66, 68, 85, 88, 102, 110, 120, 132, 136, 165, 170, 187, 204, 220, 255, 264, 330, 340, 374, 408, 440, 510, 561, 660, 680, 748, 935, 1020, 1122, 1320, 1496, 1870, 2040, 2244, 2805, 3740, 4488, 5610, 7480, 11220, 11443, 22440, 22886, 34329, 45772, 57215, 68658, 91544, 114430, 125873, 137316, 171645, 194531, 228860, 251746, 274632, 343290, 377619, 389062, 457720, 503492, 583593, 629365, 686580, 755238, 778124, 972655, 1006984, 1167186, 1258730, 1373160, 1510476, 1556248, 1888095, 1945310, 2139841, 2334372, 2517460, 2917965, 3020952, 3776190, 3890620, 4279682, 4668744, 5034920, 5835930, 6419523, 7552380, 7781240, 8559364, 10699205, 11671860, 12839046, 15104760, 17118728, 21398410, 23343720, 25678092, 32097615, 42796820, 51356184, 64195230, 85593640, 128390460, 256780920]

約数ペア:

[(1, 256780920), (2, 128390460), (3, 85593640), (4, 64195230), (5, 51356184), (6, 42796820), (8, 32097615), (10, 25678092), (11, 23343720), (12, 21398410), (15, 17118728), (17, 15104760), (20, 12839046), (22, 11671860), (24, 10699205), (30, 8559364), (33, 7781240), (34, 7552380), (40, 6419523), (44, 5835930), (51, 5034920), (55, 4668744), (60, 4279682), (66, 3890620), (68, 3776190), (85, 3020952), (88, 2917965), (102, 2517460), (110, 2334372), (120, 2139841), (132, 1945310), (136, 1888095), (165, 1556248), (170, 1510476), (187, 1373160), (204, 1258730), (220, 1167186), (255, 1006984), (264, 972655), (330, 778124), (340, 755238), (374, 686580), (408, 629365), (440, 583593), (510, 503492), (561, 457720), (660, 389062), (680, 377619), (748, 343290), (935, 274632), (1020, 251746), (1122, 228860), (1320, 194531), (1496, 171645), (1870, 137316), (2040, 125873), (2244, 114430), (2805, 91544), (3740, 68658), (4488, 57215), (5610, 45772), (7480, 34329), (11220, 22886), (11443, 22440)]