1281280

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1$

素因数の和:52

約数の個数: 144

約数和(自身を含む): 4120704

約数和(自身を除く): 2839424

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, 128, 130, 140, 143, 154, 160, 176, 182, 208, 220, 224, 256, 260, 280, 286, 308, 320, 352, 364, 385, 416, 440, 448, 455, 520, 560, 572, 616, 640, 704, 715, 728, 770, 832, 880, 896, 910, 1001, 1040, 1120, 1144, 1232, 1280, 1408, 1430, 1456, 1540, 1664, 1760, 1792, 1820, 2002, 2080, 2240, 2288, 2464, 2816, 2860, 2912, 3080, 3328, 3520, 3640, 4004, 4160, 4480, 4576, 4928, 5005, 5720, 5824, 6160, 7040, 7280, 8008, 8320, 8960, 9152, 9856, 10010, 11440, 11648, 12320, 14080, 14560, 16016, 16640, 18304, 19712, 20020, 22880, 23296, 24640, 29120, 32032, 36608, 40040, 45760, 49280, 58240, 64064, 80080, 91520, 98560, 116480, 128128, 160160, 183040, 256256, 320320, 640640, 1281280]

約数ペア:

[(1, 1281280), (2, 640640), (4, 320320), (5, 256256), (7, 183040), (8, 160160), (10, 128128), (11, 116480), (13, 98560), (14, 91520), (16, 80080), (20, 64064), (22, 58240), (26, 49280), (28, 45760), (32, 40040), (35, 36608), (40, 32032), (44, 29120), (52, 24640), (55, 23296), (56, 22880), (64, 20020), (65, 19712), (70, 18304), (77, 16640), (80, 16016), (88, 14560), (91, 14080), (104, 12320), (110, 11648), (112, 11440), (128, 10010), (130, 9856), (140, 9152), (143, 8960), (154, 8320), (160, 8008), (176, 7280), (182, 7040), (208, 6160), (220, 5824), (224, 5720), (256, 5005), (260, 4928), (280, 4576), (286, 4480), (308, 4160), (320, 4004), (352, 3640), (364, 3520), (385, 3328), (416, 3080), (440, 2912), (448, 2860), (455, 2816), (520, 2464), (560, 2288), (572, 2240), (616, 2080), (640, 2002), (704, 1820), (715, 1792), (728, 1760), (770, 1664), (832, 1540), (880, 1456), (896, 1430), (910, 1408), (1001, 1280), (1040, 1232), (1120, 1144)]