81298560

素因数分解:

$2^7\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1$

素因数の和:315

約数の個数: 256

約数和(自身を含む): 310210560

約数和(自身を除く): 228912000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 23, 24, 28, 30, 32, 35, 40, 42, 46, 48, 56, 60, 64, 69, 70, 80, 84, 92, 96, 105, 112, 115, 120, 128, 138, 140, 160, 161, 168, 184, 192, 210, 224, 230, 240, 263, 276, 280, 320, 322, 336, 345, 368, 384, 420, 448, 460, 480, 483, 526, 552, 560, 640, 644, 672, 690, 736, 789, 805, 840, 896, 920, 960, 966, 1052, 1104, 1120, 1288, 1315, 1344, 1380, 1472, 1578, 1610, 1680, 1840, 1841, 1920, 1932, 2104, 2208, 2240, 2415, 2576, 2630, 2688, 2760, 2944, 3156, 3220, 3360, 3680, 3682, 3864, 3945, 4208, 4416, 4480, 4830, 5152, 5260, 5520, 5523, 6049, 6312, 6440, 6720, 7360, 7364, 7728, 7890, 8416, 8832, 9205, 9660, 10304, 10520, 11040, 11046, 12098, 12624, 12880, 13440, 14720, 14728, 15456, 15780, 16832, 18147, 18410, 19320, 20608, 21040, 22080, 22092, 24196, 25248, 25760, 27615, 29456, 30245, 30912, 31560, 33664, 36294, 36820, 38640, 42080, 42343, 44160, 44184, 48392, 50496, 51520, 55230, 58912, 60490, 61824, 63120, 72588, 73640, 77280, 84160, 84686, 88368, 90735, 96784, 100992, 103040, 110460, 117824, 120980, 126240, 127029, 145176, 147280, 154560, 168320, 169372, 176736, 181470, 193568, 211715, 220920, 235648, 241960, 252480, 254058, 290352, 294560, 309120, 338744, 353472, 362940, 387136, 423430, 441840, 483920, 504960, 508116, 580704, 589120, 635145, 677488, 706944, 725880, 774272, 846860, 883680, 967840, 1016232, 1161408, 1178240, 1270290, 1354976, 1451760, 1693720, 1767360, 1935680, 2032464, 2322816, 2540580, 2709952, 2903520, 3387440, 3534720, 3871360, 4064928, 5081160, 5419904, 5807040, 6774880, 8129856, 10162320, 11614080, 13549760, 16259712, 20324640, 27099520, 40649280, 81298560]

約数ペア:

[(1, 81298560), (2, 40649280), (3, 27099520), (4, 20324640), (5, 16259712), (6, 13549760), (7, 11614080), (8, 10162320), (10, 8129856), (12, 6774880), (14, 5807040), (15, 5419904), (16, 5081160), (20, 4064928), (21, 3871360), (23, 3534720), (24, 3387440), (28, 2903520), (30, 2709952), (32, 2540580), (35, 2322816), (40, 2032464), (42, 1935680), (46, 1767360), (48, 1693720), (56, 1451760), (60, 1354976), (64, 1270290), (69, 1178240), (70, 1161408), (80, 1016232), (84, 967840), (92, 883680), (96, 846860), (105, 774272), (112, 725880), (115, 706944), (120, 677488), (128, 635145), (138, 589120), (140, 580704), (160, 508116), (161, 504960), (168, 483920), (184, 441840), (192, 423430), (210, 387136), (224, 362940), (230, 353472), (240, 338744), (263, 309120), (276, 294560), (280, 290352), (320, 254058), (322, 252480), (336, 241960), (345, 235648), (368, 220920), (384, 211715), (420, 193568), (448, 181470), (460, 176736), (480, 169372), (483, 168320), (526, 154560), (552, 147280), (560, 145176), (640, 127029), (644, 126240), (672, 120980), (690, 117824), (736, 110460), (789, 103040), (805, 100992), (840, 96784), (896, 90735), (920, 88368), (960, 84686), (966, 84160), (1052, 77280), (1104, 73640), (1120, 72588), (1288, 63120), (1315, 61824), (1344, 60490), (1380, 58912), (1472, 55230), (1578, 51520), (1610, 50496), (1680, 48392), (1840, 44184), (1841, 44160), (1920, 42343), (1932, 42080), (2104, 38640), (2208, 36820), (2240, 36294), (2415, 33664), (2576, 31560), (2630, 30912), (2688, 30245), (2760, 29456), (2944, 27615), (3156, 25760), (3220, 25248), (3360, 24196), (3680, 22092), (3682, 22080), (3864, 21040), (3945, 20608), (4208, 19320), (4416, 18410), (4480, 18147), (4830, 16832), (5152, 15780), (5260, 15456), (5520, 14728), (5523, 14720), (6049, 13440), (6312, 12880), (6440, 12624), (6720, 12098), (7360, 11046), (7364, 11040), (7728, 10520), (7890, 10304), (8416, 9660), (8832, 9205)]