821217280

素因数分解:

$2^{11}\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:270

約数の個数: 192

約数和(自身を含む): 2201472000

約数和(自身を除く): 1380254720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 128, 130, 155, 160, 199, 208, 248, 256, 260, 310, 320, 398, 403, 416, 496, 512, 520, 620, 640, 796, 806, 832, 992, 995, 1024, 1040, 1240, 1280, 1592, 1612, 1664, 1984, 1990, 2015, 2048, 2080, 2480, 2560, 2587, 3184, 3224, 3328, 3968, 3980, 4030, 4160, 4960, 5120, 5174, 6169, 6368, 6448, 6656, 7936, 7960, 8060, 8320, 9920, 10240, 10348, 12338, 12736, 12896, 12935, 13312, 15872, 15920, 16120, 16640, 19840, 20696, 24676, 25472, 25792, 25870, 26624, 30845, 31744, 31840, 32240, 33280, 39680, 41392, 49352, 50944, 51584, 51740, 61690, 63488, 63680, 64480, 66560, 79360, 80197, 82784, 98704, 101888, 103168, 103480, 123380, 127360, 128960, 133120, 158720, 160394, 165568, 197408, 203776, 206336, 206960, 246760, 254720, 257920, 317440, 320788, 331136, 394816, 400985, 407552, 412672, 413920, 493520, 509440, 515840, 641576, 662272, 789632, 801970, 825344, 827840, 987040, 1018880, 1031680, 1283152, 1324544, 1579264, 1603940, 1655680, 1974080, 2037760, 2063360, 2566304, 2649088, 3158528, 3207880, 3311360, 3948160, 4126720, 5132608, 5298176, 6317056, 6415760, 6622720, 7896320, 10265216, 12634112, 12831520, 13245440, 15792640, 20530432, 25663040, 26490880, 31585280, 41060864, 51326080, 63170560, 82121728, 102652160, 164243456, 205304320, 410608640, 821217280]

約数ペア:

[(1, 821217280), (2, 410608640), (4, 205304320), (5, 164243456), (8, 102652160), (10, 82121728), (13, 63170560), (16, 51326080), (20, 41060864), (26, 31585280), (31, 26490880), (32, 25663040), (40, 20530432), (52, 15792640), (62, 13245440), (64, 12831520), (65, 12634112), (80, 10265216), (104, 7896320), (124, 6622720), (128, 6415760), (130, 6317056), (155, 5298176), (160, 5132608), (199, 4126720), (208, 3948160), (248, 3311360), (256, 3207880), (260, 3158528), (310, 2649088), (320, 2566304), (398, 2063360), (403, 2037760), (416, 1974080), (496, 1655680), (512, 1603940), (520, 1579264), (620, 1324544), (640, 1283152), (796, 1031680), (806, 1018880), (832, 987040), (992, 827840), (995, 825344), (1024, 801970), (1040, 789632), (1240, 662272), (1280, 641576), (1592, 515840), (1612, 509440), (1664, 493520), (1984, 413920), (1990, 412672), (2015, 407552), (2048, 400985), (2080, 394816), (2480, 331136), (2560, 320788), (2587, 317440), (3184, 257920), (3224, 254720), (3328, 246760), (3968, 206960), (3980, 206336), (4030, 203776), (4160, 197408), (4960, 165568), (5120, 160394), (5174, 158720), (6169, 133120), (6368, 128960), (6448, 127360), (6656, 123380), (7936, 103480), (7960, 103168), (8060, 101888), (8320, 98704), (9920, 82784), (10240, 80197), (10348, 79360), (12338, 66560), (12736, 64480), (12896, 63680), (12935, 63488), (13312, 61690), (15872, 51740), (15920, 51584), (16120, 50944), (16640, 49352), (19840, 41392), (20696, 39680), (24676, 33280), (25472, 32240), (25792, 31840), (25870, 31744), (26624, 30845)]