281597440

素因数分解:

$2^9\times 5^1\times {\mathrm{317}}^1\times {\mathrm{347}}^1$

素因数の和:687

約数の個数: 80

約数和(自身を含む): 679255632

約数和(自身を除く): 397658192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 317, 320, 347, 512, 634, 640, 694, 1268, 1280, 1388, 1585, 1735, 2536, 2560, 2776, 3170, 3470, 5072, 5552, 6340, 6940, 10144, 11104, 12680, 13880, 20288, 22208, 25360, 27760, 40576, 44416, 50720, 55520, 81152, 88832, 101440, 109999, 111040, 162304, 177664, 202880, 219998, 222080, 405760, 439996, 444160, 549995, 811520, 879992, 888320, 1099990, 1759984, 2199980, 3519968, 4399960, 7039936, 8799920, 14079872, 17599840, 28159744, 35199680, 56319488, 70399360, 140798720, 281597440]

約数ペア:

[(1, 281597440), (2, 140798720), (4, 70399360), (5, 56319488), (8, 35199680), (10, 28159744), (16, 17599840), (20, 14079872), (32, 8799920), (40, 7039936), (64, 4399960), (80, 3519968), (128, 2199980), (160, 1759984), (256, 1099990), (317, 888320), (320, 879992), (347, 811520), (512, 549995), (634, 444160), (640, 439996), (694, 405760), (1268, 222080), (1280, 219998), (1388, 202880), (1585, 177664), (1735, 162304), (2536, 111040), (2560, 109999), (2776, 101440), (3170, 88832), (3470, 81152), (5072, 55520), (5552, 50720), (6340, 44416), (6940, 40576), (10144, 27760), (11104, 25360), (12680, 22208), (13880, 20288)]