257312640

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{61}}^1$

素因数の和:122

約数の個数: 256

約数和(自身を含む): 903067200

約数和(自身を除く): 645754560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 61, 64, 65, 78, 80, 96, 104, 120, 122, 128, 130, 156, 160, 169, 183, 192, 195, 208, 240, 244, 260, 305, 312, 320, 338, 366, 384, 390, 416, 480, 488, 507, 520, 610, 624, 640, 676, 732, 780, 793, 832, 845, 915, 960, 976, 1014, 1040, 1220, 1248, 1352, 1464, 1560, 1586, 1664, 1690, 1830, 1920, 1952, 2028, 2080, 2197, 2379, 2440, 2496, 2535, 2704, 2928, 3120, 3172, 3380, 3660, 3904, 3965, 4056, 4160, 4394, 4758, 4880, 4992, 5070, 5408, 5856, 6240, 6344, 6591, 6760, 7320, 7808, 7930, 8112, 8320, 8788, 9516, 9760, 10140, 10309, 10816, 10985, 11712, 11895, 12480, 12688, 13182, 13520, 14640, 15860, 16224, 17576, 19032, 19520, 20280, 20618, 21632, 21970, 23424, 23790, 24960, 25376, 26364, 27040, 29280, 30927, 31720, 32448, 32955, 35152, 38064, 39040, 40560, 41236, 43940, 47580, 50752, 51545, 52728, 54080, 58560, 61854, 63440, 64896, 65910, 70304, 76128, 81120, 82472, 87880, 95160, 101504, 103090, 105456, 108160, 117120, 123708, 126880, 131820, 134017, 140608, 152256, 154635, 162240, 164944, 175760, 190320, 206180, 210912, 247416, 253760, 263640, 268034, 281216, 304512, 309270, 324480, 329888, 351520, 380640, 402051, 412360, 421824, 494832, 507520, 527280, 536068, 618540, 659776, 670085, 703040, 761280, 804102, 824720, 843648, 989664, 1054560, 1072136, 1237080, 1319552, 1340170, 1406080, 1522560, 1608204, 1649440, 1979328, 2010255, 2109120, 2144272, 2474160, 2680340, 3216408, 3298880, 3958656, 4020510, 4218240, 4288544, 4948320, 5360680, 6432816, 6597760, 8041020, 8577088, 9896640, 10721360, 12865632, 16082040, 17154176, 19793280, 21442720, 25731264, 32164080, 42885440, 51462528, 64328160, 85770880, 128656320, 257312640]

約数ペア:

[(1, 257312640), (2, 128656320), (3, 85770880), (4, 64328160), (5, 51462528), (6, 42885440), (8, 32164080), (10, 25731264), (12, 21442720), (13, 19793280), (15, 17154176), (16, 16082040), (20, 12865632), (24, 10721360), (26, 9896640), (30, 8577088), (32, 8041020), (39, 6597760), (40, 6432816), (48, 5360680), (52, 4948320), (60, 4288544), (61, 4218240), (64, 4020510), (65, 3958656), (78, 3298880), (80, 3216408), (96, 2680340), (104, 2474160), (120, 2144272), (122, 2109120), (128, 2010255), (130, 1979328), (156, 1649440), (160, 1608204), (169, 1522560), (183, 1406080), (192, 1340170), (195, 1319552), (208, 1237080), (240, 1072136), (244, 1054560), (260, 989664), (305, 843648), (312, 824720), (320, 804102), (338, 761280), (366, 703040), (384, 670085), (390, 659776), (416, 618540), (480, 536068), (488, 527280), (507, 507520), (520, 494832), (610, 421824), (624, 412360), (640, 402051), (676, 380640), (732, 351520), (780, 329888), (793, 324480), (832, 309270), (845, 304512), (915, 281216), (960, 268034), (976, 263640), (1014, 253760), (1040, 247416), (1220, 210912), (1248, 206180), (1352, 190320), (1464, 175760), (1560, 164944), (1586, 162240), (1664, 154635), (1690, 152256), (1830, 140608), (1920, 134017), (1952, 131820), (2028, 126880), (2080, 123708), (2197, 117120), (2379, 108160), (2440, 105456), (2496, 103090), (2535, 101504), (2704, 95160), (2928, 87880), (3120, 82472), (3172, 81120), (3380, 76128), (3660, 70304), (3904, 65910), (3965, 64896), (4056, 63440), (4160, 61854), (4394, 58560), (4758, 54080), (4880, 52728), (4992, 51545), (5070, 50752), (5408, 47580), (5856, 43940), (6240, 41236), (6344, 40560), (6591, 39040), (6760, 38064), (7320, 35152), (7808, 32955), (7930, 32448), (8112, 31720), (8320, 30927), (8788, 29280), (9516, 27040), (9760, 26364), (10140, 25376), (10309, 24960), (10816, 23790), (10985, 23424), (11712, 21970), (11895, 21632), (12480, 20618), (12688, 20280), (13182, 19520), (13520, 19032), (14640, 17576), (15860, 16224)]