256548560

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:193

約数の個数: 120

約数和(自身を含む): 638316288

約数和(自身を除く): 381767728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 47, 62, 71, 80, 94, 124, 142, 155, 188, 235, 248, 284, 310, 355, 376, 470, 496, 568, 620, 710, 752, 940, 961, 1136, 1240, 1420, 1457, 1880, 1922, 2201, 2480, 2840, 2914, 3337, 3760, 3844, 4402, 4805, 5680, 5828, 6674, 7285, 7688, 8804, 9610, 11005, 11656, 13348, 14570, 15376, 16685, 17608, 19220, 22010, 23312, 26696, 29140, 33370, 35216, 38440, 44020, 45167, 53392, 58280, 66740, 68231, 76880, 88040, 90334, 103447, 116560, 133480, 136462, 176080, 180668, 206894, 225835, 266960, 272924, 341155, 361336, 413788, 451670, 517235, 545848, 682310, 722672, 827576, 903340, 1034470, 1091696, 1364620, 1655152, 1806680, 2068940, 2729240, 3206857, 3613360, 4137880, 5458480, 6413714, 8275760, 12827428, 16034285, 25654856, 32068570, 51309712, 64137140, 128274280, 256548560]

約数ペア:

[(1, 256548560), (2, 128274280), (4, 64137140), (5, 51309712), (8, 32068570), (10, 25654856), (16, 16034285), (20, 12827428), (31, 8275760), (40, 6413714), (47, 5458480), (62, 4137880), (71, 3613360), (80, 3206857), (94, 2729240), (124, 2068940), (142, 1806680), (155, 1655152), (188, 1364620), (235, 1091696), (248, 1034470), (284, 903340), (310, 827576), (355, 722672), (376, 682310), (470, 545848), (496, 517235), (568, 451670), (620, 413788), (710, 361336), (752, 341155), (940, 272924), (961, 266960), (1136, 225835), (1240, 206894), (1420, 180668), (1457, 176080), (1880, 136462), (1922, 133480), (2201, 116560), (2480, 103447), (2840, 90334), (2914, 88040), (3337, 76880), (3760, 68231), (3844, 66740), (4402, 58280), (4805, 53392), (5680, 45167), (5828, 44020), (6674, 38440), (7285, 35216), (7688, 33370), (8804, 29140), (9610, 26696), (11005, 23312), (11656, 22010), (13348, 19220), (14570, 17608), (15376, 16685)]