647121280

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{193}}^1$

素因数の和:269

約数の個数: 192

約数和(自身を含む): 1738177920

約数和(自身を除く): 1091056640

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, 169, 193, 208, 248, 260, 310, 320, 338, 386, 403, 416, 496, 520, 620, 640, 676, 772, 806, 832, 845, 965, 992, 1040, 1240, 1352, 1544, 1612, 1664, 1690, 1930, 1984, 2015, 2080, 2480, 2509, 2704, 3088, 3224, 3380, 3860, 3968, 4030, 4160, 4960, 5018, 5239, 5408, 5983, 6176, 6448, 6760, 7720, 8060, 8320, 9920, 10036, 10478, 10816, 11966, 12352, 12545, 12896, 13520, 15440, 16120, 19840, 20072, 20956, 21632, 23932, 24704, 25090, 25792, 26195, 27040, 29915, 30880, 32240, 32617, 40144, 41912, 47864, 50180, 51584, 52390, 54080, 59830, 61760, 64480, 65234, 77779, 80288, 83824, 95728, 100360, 104780, 108160, 119660, 123520, 128960, 130468, 155558, 160576, 163085, 167648, 191456, 200720, 209560, 239320, 257920, 260936, 311116, 321152, 326170, 335296, 382912, 388895, 401440, 419120, 478640, 521872, 622232, 652340, 670592, 765824, 777790, 802880, 838240, 957280, 1011127, 1043744, 1244464, 1304680, 1555580, 1605760, 1676480, 1914560, 2022254, 2087488, 2488928, 2609360, 3111160, 3352960, 3829120, 4044508, 4174976, 4977856, 5055635, 5218720, 6222320, 8089016, 9955712, 10111270, 10437440, 12444640, 16178032, 20222540, 20874880, 24889280, 32356064, 40445080, 49778560, 64712128, 80890160, 129424256, 161780320, 323560640, 647121280]

約数ペア:

[(1, 647121280), (2, 323560640), (4, 161780320), (5, 129424256), (8, 80890160), (10, 64712128), (13, 49778560), (16, 40445080), (20, 32356064), (26, 24889280), (31, 20874880), (32, 20222540), (40, 16178032), (52, 12444640), (62, 10437440), (64, 10111270), (65, 9955712), (80, 8089016), (104, 6222320), (124, 5218720), (128, 5055635), (130, 4977856), (155, 4174976), (160, 4044508), (169, 3829120), (193, 3352960), (208, 3111160), (248, 2609360), (260, 2488928), (310, 2087488), (320, 2022254), (338, 1914560), (386, 1676480), (403, 1605760), (416, 1555580), (496, 1304680), (520, 1244464), (620, 1043744), (640, 1011127), (676, 957280), (772, 838240), (806, 802880), (832, 777790), (845, 765824), (965, 670592), (992, 652340), (1040, 622232), (1240, 521872), (1352, 478640), (1544, 419120), (1612, 401440), (1664, 388895), (1690, 382912), (1930, 335296), (1984, 326170), (2015, 321152), (2080, 311116), (2480, 260936), (2509, 257920), (2704, 239320), (3088, 209560), (3224, 200720), (3380, 191456), (3860, 167648), (3968, 163085), (4030, 160576), (4160, 155558), (4960, 130468), (5018, 128960), (5239, 123520), (5408, 119660), (5983, 108160), (6176, 104780), (6448, 100360), (6760, 95728), (7720, 83824), (8060, 80288), (8320, 77779), (9920, 65234), (10036, 64480), (10478, 61760), (10816, 59830), (11966, 54080), (12352, 52390), (12545, 51584), (12896, 50180), (13520, 47864), (15440, 41912), (16120, 40144), (19840, 32617), (20072, 32240), (20956, 30880), (21632, 29915), (23932, 27040), (24704, 26195), (25090, 25792)]