19987968

素因数分解:

$2^9\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2$

素因数の和:65

約数の個数: 240

約数和(自身を含む): 71888256

約数和(自身を除く): 51900288

約数列:

[1, 2, 3, 4, 6, 7, 8, 11, 12, 13, 14, 16, 21, 22, 24, 26, 28, 32, 33, 39, 42, 44, 48, 52, 56, 64, 66, 77, 78, 84, 88, 91, 96, 104, 112, 128, 132, 143, 154, 156, 168, 169, 176, 182, 192, 208, 224, 231, 256, 264, 273, 286, 308, 312, 336, 338, 352, 364, 384, 416, 429, 448, 462, 507, 512, 528, 546, 572, 616, 624, 672, 676, 704, 728, 768, 832, 858, 896, 924, 1001, 1014, 1056, 1092, 1144, 1183, 1232, 1248, 1344, 1352, 1408, 1456, 1536, 1664, 1716, 1792, 1848, 1859, 2002, 2028, 2112, 2184, 2288, 2366, 2464, 2496, 2688, 2704, 2816, 2912, 3003, 3328, 3432, 3549, 3584, 3696, 3718, 4004, 4056, 4224, 4368, 4576, 4732, 4928, 4992, 5376, 5408, 5577, 5632, 5824, 6006, 6656, 6864, 7098, 7392, 7436, 8008, 8112, 8448, 8736, 9152, 9464, 9856, 9984, 10752, 10816, 11154, 11648, 12012, 13013, 13728, 14196, 14784, 14872, 16016, 16224, 16896, 17472, 18304, 18928, 19712, 19968, 21632, 22308, 23296, 24024, 26026, 27456, 28392, 29568, 29744, 32032, 32448, 34944, 36608, 37856, 39039, 39424, 43264, 44616, 46592, 48048, 52052, 54912, 56784, 59136, 59488, 64064, 64896, 69888, 73216, 75712, 78078, 86528, 89232, 96096, 104104, 109824, 113568, 118272, 118976, 128128, 129792, 139776, 151424, 156156, 178464, 192192, 208208, 219648, 227136, 237952, 256256, 259584, 302848, 312312, 356928, 384384, 416416, 454272, 475904, 512512, 605696, 624624, 713856, 768768, 832832, 908544, 951808, 1249248, 1427712, 1537536, 1665664, 1817088, 2498496, 2855424, 3331328, 4996992, 6662656, 9993984, 19987968]

約数ペア:

[(1, 19987968), (2, 9993984), (3, 6662656), (4, 4996992), (6, 3331328), (7, 2855424), (8, 2498496), (11, 1817088), (12, 1665664), (13, 1537536), (14, 1427712), (16, 1249248), (21, 951808), (22, 908544), (24, 832832), (26, 768768), (28, 713856), (32, 624624), (33, 605696), (39, 512512), (42, 475904), (44, 454272), (48, 416416), (52, 384384), (56, 356928), (64, 312312), (66, 302848), (77, 259584), (78, 256256), (84, 237952), (88, 227136), (91, 219648), (96, 208208), (104, 192192), (112, 178464), (128, 156156), (132, 151424), (143, 139776), (154, 129792), (156, 128128), (168, 118976), (169, 118272), (176, 113568), (182, 109824), (192, 104104), (208, 96096), (224, 89232), (231, 86528), (256, 78078), (264, 75712), (273, 73216), (286, 69888), (308, 64896), (312, 64064), (336, 59488), (338, 59136), (352, 56784), (364, 54912), (384, 52052), (416, 48048), (429, 46592), (448, 44616), (462, 43264), (507, 39424), (512, 39039), (528, 37856), (546, 36608), (572, 34944), (616, 32448), (624, 32032), (672, 29744), (676, 29568), (704, 28392), (728, 27456), (768, 26026), (832, 24024), (858, 23296), (896, 22308), (924, 21632), (1001, 19968), (1014, 19712), (1056, 18928), (1092, 18304), (1144, 17472), (1183, 16896), (1232, 16224), (1248, 16016), (1344, 14872), (1352, 14784), (1408, 14196), (1456, 13728), (1536, 13013), (1664, 12012), (1716, 11648), (1792, 11154), (1848, 10816), (1859, 10752), (2002, 9984), (2028, 9856), (2112, 9464), (2184, 9152), (2288, 8736), (2366, 8448), (2464, 8112), (2496, 8008), (2688, 7436), (2704, 7392), (2816, 7098), (2912, 6864), (3003, 6656), (3328, 6006), (3432, 5824), (3549, 5632), (3584, 5577), (3696, 5408), (3718, 5376), (4004, 4992), (4056, 4928), (4224, 4732), (4368, 4576)]