257261312

素因数分解:

$2^8\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:486

約数の個数: 144

約数和(自身を含む): 662452224

約数和(自身を除く): 405190912

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 31, 32, 44, 56, 62, 64, 77, 88, 112, 124, 128, 154, 176, 217, 224, 248, 256, 308, 341, 352, 421, 434, 448, 496, 616, 682, 704, 842, 868, 896, 992, 1232, 1364, 1408, 1684, 1736, 1792, 1984, 2387, 2464, 2728, 2816, 2947, 3368, 3472, 3968, 4631, 4774, 4928, 5456, 5894, 6736, 6944, 7936, 9262, 9548, 9856, 10912, 11788, 13051, 13472, 13888, 18524, 19096, 19712, 21824, 23576, 26102, 26944, 27776, 32417, 37048, 38192, 43648, 47152, 52204, 53888, 55552, 64834, 74096, 76384, 87296, 91357, 94304, 104408, 107776, 129668, 143561, 148192, 152768, 182714, 188608, 208816, 259336, 287122, 296384, 305536, 365428, 377216, 417632, 518672, 574244, 592768, 611072, 730856, 754432, 835264, 1004927, 1037344, 1148488, 1185536, 1461712, 1670528, 2009854, 2074688, 2296976, 2923424, 3341056, 4019708, 4149376, 4593952, 5846848, 8039416, 8298752, 9187904, 11693696, 16078832, 18375808, 23387392, 32157664, 36751616, 64315328, 128630656, 257261312]

約数ペア:

[(1, 257261312), (2, 128630656), (4, 64315328), (7, 36751616), (8, 32157664), (11, 23387392), (14, 18375808), (16, 16078832), (22, 11693696), (28, 9187904), (31, 8298752), (32, 8039416), (44, 5846848), (56, 4593952), (62, 4149376), (64, 4019708), (77, 3341056), (88, 2923424), (112, 2296976), (124, 2074688), (128, 2009854), (154, 1670528), (176, 1461712), (217, 1185536), (224, 1148488), (248, 1037344), (256, 1004927), (308, 835264), (341, 754432), (352, 730856), (421, 611072), (434, 592768), (448, 574244), (496, 518672), (616, 417632), (682, 377216), (704, 365428), (842, 305536), (868, 296384), (896, 287122), (992, 259336), (1232, 208816), (1364, 188608), (1408, 182714), (1684, 152768), (1736, 148192), (1792, 143561), (1984, 129668), (2387, 107776), (2464, 104408), (2728, 94304), (2816, 91357), (2947, 87296), (3368, 76384), (3472, 74096), (3968, 64834), (4631, 55552), (4774, 53888), (4928, 52204), (5456, 47152), (5894, 43648), (6736, 38192), (6944, 37048), (7936, 32417), (9262, 27776), (9548, 26944), (9856, 26102), (10912, 23576), (11788, 21824), (13051, 19712), (13472, 19096), (13888, 18524)]