81361280

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1$

素因数の和:177

約数の個数: 256

約数和(自身を含む): 263208960

約数和(自身を除く): 181847680

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 26, 28, 32, 35, 40, 44, 52, 55, 56, 64, 65, 70, 77, 80, 88, 91, 104, 110, 112, 127, 128, 130, 140, 143, 154, 160, 176, 182, 208, 220, 224, 254, 260, 280, 286, 308, 320, 352, 364, 385, 416, 440, 448, 455, 508, 520, 560, 572, 616, 635, 640, 704, 715, 728, 770, 832, 880, 889, 896, 910, 1001, 1016, 1040, 1120, 1144, 1232, 1270, 1397, 1408, 1430, 1456, 1540, 1651, 1664, 1760, 1778, 1820, 2002, 2032, 2080, 2240, 2288, 2464, 2540, 2794, 2860, 2912, 3080, 3302, 3520, 3556, 3640, 4004, 4064, 4160, 4445, 4480, 4576, 4928, 5005, 5080, 5588, 5720, 5824, 6160, 6604, 6985, 7040, 7112, 7280, 8008, 8128, 8255, 8320, 8890, 9152, 9779, 9856, 10010, 10160, 11176, 11440, 11557, 11648, 12320, 13208, 13970, 14224, 14560, 16016, 16256, 16510, 17780, 18161, 18304, 19558, 20020, 20320, 22352, 22880, 23114, 24640, 26416, 27940, 28448, 29120, 32032, 33020, 35560, 36322, 39116, 40040, 40640, 44704, 45760, 46228, 48895, 49280, 52832, 55880, 56896, 57785, 58240, 64064, 66040, 71120, 72644, 78232, 80080, 81280, 89408, 90805, 91520, 92456, 97790, 105664, 111760, 113792, 115570, 127127, 128128, 132080, 142240, 145288, 156464, 160160, 178816, 181610, 184912, 195580, 211328, 223520, 231140, 254254, 264160, 284480, 290576, 312928, 320320, 363220, 369824, 391160, 447040, 462280, 508508, 528320, 568960, 581152, 625856, 635635, 640640, 726440, 739648, 782320, 894080, 924560, 1017016, 1056640, 1162304, 1251712, 1271270, 1452880, 1479296, 1564640, 1849120, 2034032, 2324608, 2542540, 2905760, 3129280, 3698240, 4068064, 5085080, 5811520, 6258560, 7396480, 8136128, 10170160, 11623040, 16272256, 20340320, 40680640, 81361280]

約数ペア:

[(1, 81361280), (2, 40680640), (4, 20340320), (5, 16272256), (7, 11623040), (8, 10170160), (10, 8136128), (11, 7396480), (13, 6258560), (14, 5811520), (16, 5085080), (20, 4068064), (22, 3698240), (26, 3129280), (28, 2905760), (32, 2542540), (35, 2324608), (40, 2034032), (44, 1849120), (52, 1564640), (55, 1479296), (56, 1452880), (64, 1271270), (65, 1251712), (70, 1162304), (77, 1056640), (80, 1017016), (88, 924560), (91, 894080), (104, 782320), (110, 739648), (112, 726440), (127, 640640), (128, 635635), (130, 625856), (140, 581152), (143, 568960), (154, 528320), (160, 508508), (176, 462280), (182, 447040), (208, 391160), (220, 369824), (224, 363220), (254, 320320), (260, 312928), (280, 290576), (286, 284480), (308, 264160), (320, 254254), (352, 231140), (364, 223520), (385, 211328), (416, 195580), (440, 184912), (448, 181610), (455, 178816), (508, 160160), (520, 156464), (560, 145288), (572, 142240), (616, 132080), (635, 128128), (640, 127127), (704, 115570), (715, 113792), (728, 111760), (770, 105664), (832, 97790), (880, 92456), (889, 91520), (896, 90805), (910, 89408), (1001, 81280), (1016, 80080), (1040, 78232), (1120, 72644), (1144, 71120), (1232, 66040), (1270, 64064), (1397, 58240), (1408, 57785), (1430, 56896), (1456, 55880), (1540, 52832), (1651, 49280), (1664, 48895), (1760, 46228), (1778, 45760), (1820, 44704), (2002, 40640), (2032, 40040), (2080, 39116), (2240, 36322), (2288, 35560), (2464, 33020), (2540, 32032), (2794, 29120), (2860, 28448), (2912, 27940), (3080, 26416), (3302, 24640), (3520, 23114), (3556, 22880), (3640, 22352), (4004, 20320), (4064, 20020), (4160, 19558), (4445, 18304), (4480, 18161), (4576, 17780), (4928, 16510), (5005, 16256), (5080, 16016), (5588, 14560), (5720, 14224), (5824, 13970), (6160, 13208), (6604, 12320), (6985, 11648), (7040, 11557), (7112, 11440), (7280, 11176), (8008, 10160), (8128, 10010), (8255, 9856), (8320, 9779), (8890, 9152)]