257211136

素因数分解:

$2^8\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:278

約数の個数: 144

約数和(自身を含む): 645805888

約数和(自身を除く): 388594752

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 61, 64, 91, 104, 112, 122, 128, 181, 182, 208, 224, 244, 256, 362, 364, 416, 427, 448, 488, 724, 728, 793, 832, 854, 896, 976, 1267, 1448, 1456, 1586, 1664, 1708, 1792, 1952, 2353, 2534, 2896, 2912, 3172, 3328, 3416, 3904, 4706, 5068, 5551, 5792, 5824, 6344, 6832, 7808, 9412, 10136, 11041, 11102, 11584, 11648, 12688, 13664, 15616, 16471, 18824, 20272, 22082, 22204, 23168, 23296, 25376, 27328, 32942, 37648, 40544, 44164, 44408, 46336, 50752, 54656, 65884, 75296, 77287, 81088, 88328, 88816, 101504, 109312, 131768, 143533, 150592, 154574, 162176, 176656, 177632, 203008, 263536, 287066, 301184, 309148, 324352, 353312, 355264, 527072, 574132, 602368, 618296, 706624, 710528, 1004731, 1054144, 1148264, 1236592, 1413248, 1421056, 2009462, 2108288, 2296528, 2473184, 2826496, 4018924, 4216576, 4593056, 4946368, 8037848, 9186112, 9892736, 16075696, 18372224, 19785472, 32151392, 36744448, 64302784, 128605568, 257211136]

約数ペア:

[(1, 257211136), (2, 128605568), (4, 64302784), (7, 36744448), (8, 32151392), (13, 19785472), (14, 18372224), (16, 16075696), (26, 9892736), (28, 9186112), (32, 8037848), (52, 4946368), (56, 4593056), (61, 4216576), (64, 4018924), (91, 2826496), (104, 2473184), (112, 2296528), (122, 2108288), (128, 2009462), (181, 1421056), (182, 1413248), (208, 1236592), (224, 1148264), (244, 1054144), (256, 1004731), (362, 710528), (364, 706624), (416, 618296), (427, 602368), (448, 574132), (488, 527072), (724, 355264), (728, 353312), (793, 324352), (832, 309148), (854, 301184), (896, 287066), (976, 263536), (1267, 203008), (1448, 177632), (1456, 176656), (1586, 162176), (1664, 154574), (1708, 150592), (1792, 143533), (1952, 131768), (2353, 109312), (2534, 101504), (2896, 88816), (2912, 88328), (3172, 81088), (3328, 77287), (3416, 75296), (3904, 65884), (4706, 54656), (5068, 50752), (5551, 46336), (5792, 44408), (5824, 44164), (6344, 40544), (6832, 37648), (7808, 32942), (9412, 27328), (10136, 25376), (11041, 23296), (11102, 23168), (11584, 22204), (11648, 22082), (12688, 20272), (13664, 18824), (15616, 16471)]