646537984

素因数分解:

$2^8\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{317}}^1$

素因数の和:621

約数の個数: 72

約数和(自身を含む): 1341583488

約数和(自身を除く): 695045504

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 257, 317, 496, 514, 634, 992, 1028, 1268, 1984, 2056, 2536, 3968, 4112, 5072, 7936, 7967, 8224, 9827, 10144, 15934, 16448, 19654, 20288, 31868, 32896, 39308, 40576, 63736, 65792, 78616, 81152, 81469, 127472, 157232, 162938, 254944, 314464, 325876, 509888, 628928, 651752, 1019776, 1257856, 1303504, 2039552, 2515712, 2525539, 2607008, 5051078, 5214016, 10102156, 10428032, 20204312, 20856064, 40408624, 80817248, 161634496, 323268992, 646537984]

約数ペア:

[(1, 646537984), (2, 323268992), (4, 161634496), (8, 80817248), (16, 40408624), (31, 20856064), (32, 20204312), (62, 10428032), (64, 10102156), (124, 5214016), (128, 5051078), (248, 2607008), (256, 2525539), (257, 2515712), (317, 2039552), (496, 1303504), (514, 1257856), (634, 1019776), (992, 651752), (1028, 628928), (1268, 509888), (1984, 325876), (2056, 314464), (2536, 254944), (3968, 162938), (4112, 157232), (5072, 127472), (7936, 81469), (7967, 81152), (8224, 78616), (9827, 65792), (10144, 63736), (15934, 40576), (16448, 39308), (19654, 32896), (20288, 31868)]