256555520

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^2\times {\mathrm{593}}^1$

素因数の和:642

約数の個数: 120

約数和(自身を含む): 667212876

約数和(自身を除く): 410657356

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 169, 208, 256, 260, 320, 338, 416, 512, 520, 593, 640, 676, 832, 845, 1040, 1186, 1280, 1352, 1664, 1690, 2080, 2372, 2560, 2704, 2965, 3328, 3380, 4160, 4744, 5408, 5930, 6656, 6760, 7709, 8320, 9488, 10816, 11860, 13520, 15418, 16640, 18976, 21632, 23720, 27040, 30836, 33280, 37952, 38545, 43264, 47440, 54080, 61672, 75904, 77090, 86528, 94880, 100217, 108160, 123344, 151808, 154180, 189760, 200434, 216320, 246688, 303616, 308360, 379520, 400868, 432640, 493376, 501085, 616720, 759040, 801736, 986752, 1002170, 1233440, 1518080, 1603472, 1973504, 2004340, 2466880, 3206944, 3947008, 4008680, 4933760, 6413888, 8017360, 9867520, 12827776, 16034720, 19735040, 25655552, 32069440, 51311104, 64138880, 128277760, 256555520]

約数ペア:

[(1, 256555520), (2, 128277760), (4, 64138880), (5, 51311104), (8, 32069440), (10, 25655552), (13, 19735040), (16, 16034720), (20, 12827776), (26, 9867520), (32, 8017360), (40, 6413888), (52, 4933760), (64, 4008680), (65, 3947008), (80, 3206944), (104, 2466880), (128, 2004340), (130, 1973504), (160, 1603472), (169, 1518080), (208, 1233440), (256, 1002170), (260, 986752), (320, 801736), (338, 759040), (416, 616720), (512, 501085), (520, 493376), (593, 432640), (640, 400868), (676, 379520), (832, 308360), (845, 303616), (1040, 246688), (1186, 216320), (1280, 200434), (1352, 189760), (1664, 154180), (1690, 151808), (2080, 123344), (2372, 108160), (2560, 100217), (2704, 94880), (2965, 86528), (3328, 77090), (3380, 75904), (4160, 61672), (4744, 54080), (5408, 47440), (5930, 43264), (6656, 38545), (6760, 37952), (7709, 33280), (8320, 30836), (9488, 27040), (10816, 23720), (11860, 21632), (13520, 18976), (15418, 16640)]