261137968

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{97}}^1$

素因数の和:211

約数の個数: 120

約数和(自身を含む): 644104608

約数和(自身を除く): 382966640

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 43, 52, 56, 86, 91, 97, 104, 112, 172, 182, 194, 208, 301, 344, 364, 388, 559, 602, 679, 688, 728, 776, 1118, 1204, 1261, 1358, 1456, 1552, 1849, 2236, 2408, 2522, 2716, 3698, 3913, 4171, 4472, 4816, 5044, 5432, 7396, 7826, 8342, 8827, 8944, 10088, 10864, 12943, 14792, 15652, 16684, 17654, 20176, 24037, 25886, 29197, 29584, 31304, 33368, 35308, 48074, 51772, 54223, 58394, 62608, 66736, 70616, 96148, 103544, 108446, 116788, 141232, 168259, 179353, 192296, 207088, 216892, 233576, 336518, 358706, 379561, 384592, 433784, 467152, 673036, 717412, 759122, 867568, 1255471, 1346072, 1434824, 1518244, 2331589, 2510942, 2692144, 2869648, 3036488, 4663178, 5021884, 6072976, 9326356, 10043768, 16321123, 18652712, 20087536, 32642246, 37305424, 65284492, 130568984, 261137968]

約数ペア:

[(1, 261137968), (2, 130568984), (4, 65284492), (7, 37305424), (8, 32642246), (13, 20087536), (14, 18652712), (16, 16321123), (26, 10043768), (28, 9326356), (43, 6072976), (52, 5021884), (56, 4663178), (86, 3036488), (91, 2869648), (97, 2692144), (104, 2510942), (112, 2331589), (172, 1518244), (182, 1434824), (194, 1346072), (208, 1255471), (301, 867568), (344, 759122), (364, 717412), (388, 673036), (559, 467152), (602, 433784), (679, 384592), (688, 379561), (728, 358706), (776, 336518), (1118, 233576), (1204, 216892), (1261, 207088), (1358, 192296), (1456, 179353), (1552, 168259), (1849, 141232), (2236, 116788), (2408, 108446), (2522, 103544), (2716, 96148), (3698, 70616), (3913, 66736), (4171, 62608), (4472, 58394), (4816, 54223), (5044, 51772), (5432, 48074), (7396, 35308), (7826, 33368), (8342, 31304), (8827, 29584), (8944, 29197), (10088, 25886), (10864, 24037), (12943, 20176), (14792, 17654), (15652, 16684)]