640721664

素因数分解:

$2^8\times 3^4\times {\mathrm{11}}^1\times {\mathrm{53}}^2$

素因数の和:145

約数の個数: 270

約数和(自身を含む): 2124265836

約数和(自身を除く): 1483544172

約数列:

[1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 27, 32, 33, 36, 44, 48, 53, 54, 64, 66, 72, 81, 88, 96, 99, 106, 108, 128, 132, 144, 159, 162, 176, 192, 198, 212, 216, 256, 264, 288, 297, 318, 324, 352, 384, 396, 424, 432, 477, 528, 576, 583, 594, 636, 648, 704, 768, 792, 848, 864, 891, 954, 1056, 1152, 1166, 1188, 1272, 1296, 1408, 1431, 1584, 1696, 1728, 1749, 1782, 1908, 2112, 2304, 2332, 2376, 2544, 2592, 2809, 2816, 2862, 3168, 3392, 3456, 3498, 3564, 3816, 4224, 4293, 4664, 4752, 5088, 5184, 5247, 5618, 5724, 6336, 6784, 6912, 6996, 7128, 7632, 8427, 8448, 8586, 9328, 9504, 10176, 10368, 10494, 11236, 11448, 12672, 13568, 13992, 14256, 15264, 15741, 16854, 17172, 18656, 19008, 20352, 20736, 20988, 22472, 22896, 25281, 25344, 27984, 28512, 30528, 30899, 31482, 33708, 34344, 37312, 38016, 40704, 41976, 44944, 45792, 47223, 50562, 55968, 57024, 61056, 61798, 62964, 67416, 68688, 74624, 75843, 76032, 83952, 89888, 91584, 92697, 94446, 101124, 111936, 114048, 122112, 123596, 125928, 134832, 137376, 149248, 151686, 167904, 179776, 183168, 185394, 188892, 202248, 223872, 227529, 228096, 247192, 251856, 269664, 274752, 278091, 303372, 335808, 359552, 366336, 370788, 377784, 404496, 447744, 455058, 494384, 503712, 539328, 549504, 556182, 606744, 671616, 719104, 741576, 755568, 808992, 834273, 910116, 988768, 1007424, 1078656, 1099008, 1112364, 1213488, 1343232, 1483152, 1511136, 1617984, 1668546, 1820232, 1977536, 2014848, 2157312, 2224728, 2426976, 2502819, 2966304, 3022272, 3235968, 3337092, 3640464, 3955072, 4029696, 4449456, 4853952, 5005638, 5932608, 6044544, 6471936, 6674184, 7280928, 7910144, 8898912, 9707904, 10011276, 11865216, 12089088, 13348368, 14561856, 17797824, 19415808, 20022552, 23730432, 26696736, 29123712, 35595648, 40045104, 53393472, 58247424, 71191296, 80090208, 106786944, 160180416, 213573888, 320360832, 640721664]

約数ペア:

[(1, 640721664), (2, 320360832), (3, 213573888), (4, 160180416), (6, 106786944), (8, 80090208), (9, 71191296), (11, 58247424), (12, 53393472), (16, 40045104), (18, 35595648), (22, 29123712), (24, 26696736), (27, 23730432), (32, 20022552), (33, 19415808), (36, 17797824), (44, 14561856), (48, 13348368), (53, 12089088), (54, 11865216), (64, 10011276), (66, 9707904), (72, 8898912), (81, 7910144), (88, 7280928), (96, 6674184), (99, 6471936), (106, 6044544), (108, 5932608), (128, 5005638), (132, 4853952), (144, 4449456), (159, 4029696), (162, 3955072), (176, 3640464), (192, 3337092), (198, 3235968), (212, 3022272), (216, 2966304), (256, 2502819), (264, 2426976), (288, 2224728), (297, 2157312), (318, 2014848), (324, 1977536), (352, 1820232), (384, 1668546), (396, 1617984), (424, 1511136), (432, 1483152), (477, 1343232), (528, 1213488), (576, 1112364), (583, 1099008), (594, 1078656), (636, 1007424), (648, 988768), (704, 910116), (768, 834273), (792, 808992), (848, 755568), (864, 741576), (891, 719104), (954, 671616), (1056, 606744), (1152, 556182), (1166, 549504), (1188, 539328), (1272, 503712), (1296, 494384), (1408, 455058), (1431, 447744), (1584, 404496), (1696, 377784), (1728, 370788), (1749, 366336), (1782, 359552), (1908, 335808), (2112, 303372), (2304, 278091), (2332, 274752), (2376, 269664), (2544, 251856), (2592, 247192), (2809, 228096), (2816, 227529), (2862, 223872), (3168, 202248), (3392, 188892), (3456, 185394), (3498, 183168), (3564, 179776), (3816, 167904), (4224, 151686), (4293, 149248), (4664, 137376), (4752, 134832), (5088, 125928), (5184, 123596), (5247, 122112), (5618, 114048), (5724, 111936), (6336, 101124), (6784, 94446), (6912, 92697), (6996, 91584), (7128, 89888), (7632, 83952), (8427, 76032), (8448, 75843), (8586, 74624), (9328, 68688), (9504, 67416), (10176, 62964), (10368, 61798), (10494, 61056), (11236, 57024), (11448, 55968), (12672, 50562), (13568, 47223), (13992, 45792), (14256, 44944), (15264, 41976), (15741, 40704), (16854, 38016), (17172, 37312), (18656, 34344), (19008, 33708), (20352, 31482), (20736, 30899), (20988, 30528), (22472, 28512), (22896, 27984), (25281, 25344)]