256994464

素因数分解:

$2^5\times {\mathrm{31}}^2\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:270

約数の個数: 72

約数和(自身を含む): 535254804

約数和(自身を除く): 278260340

約数列:

[1, 2, 4, 8, 16, 31, 32, 61, 62, 122, 124, 137, 244, 248, 274, 488, 496, 548, 961, 976, 992, 1096, 1891, 1922, 1952, 2192, 3782, 3844, 4247, 4384, 7564, 7688, 8357, 8494, 15128, 15376, 16714, 16988, 30256, 30752, 33428, 33976, 58621, 60512, 66856, 67952, 117242, 131657, 133712, 135904, 234484, 259067, 263314, 267424, 468968, 518134, 526628, 937936, 1036268, 1053256, 1875872, 2072536, 2106512, 4145072, 4213024, 8031077, 8290144, 16062154, 32124308, 64248616, 128497232, 256994464]

約数ペア:

[(1, 256994464), (2, 128497232), (4, 64248616), (8, 32124308), (16, 16062154), (31, 8290144), (32, 8031077), (61, 4213024), (62, 4145072), (122, 2106512), (124, 2072536), (137, 1875872), (244, 1053256), (248, 1036268), (274, 937936), (488, 526628), (496, 518134), (548, 468968), (961, 267424), (976, 263314), (992, 259067), (1096, 234484), (1891, 135904), (1922, 133712), (1952, 131657), (2192, 117242), (3782, 67952), (3844, 66856), (4247, 60512), (4384, 58621), (7564, 33976), (7688, 33428), (8357, 30752), (8494, 30256), (15128, 16988), (15376, 16714)]