81758720

素因数分解:

$2^9\times 5^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:425

約数の個数: 80

約数和(自身を含む): 198502920

約数和(自身を除く): 116744200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 256, 293, 320, 436, 512, 545, 586, 640, 872, 1090, 1172, 1280, 1465, 1744, 2180, 2344, 2560, 2930, 3488, 4360, 4688, 5860, 6976, 8720, 9376, 11720, 13952, 17440, 18752, 23440, 27904, 31937, 34880, 37504, 46880, 55808, 63874, 69760, 75008, 93760, 127748, 139520, 150016, 159685, 187520, 255496, 279040, 319370, 375040, 510992, 638740, 750080, 1021984, 1277480, 2043968, 2554960, 4087936, 5109920, 8175872, 10219840, 16351744, 20439680, 40879360, 81758720]

約数ペア:

[(1, 81758720), (2, 40879360), (4, 20439680), (5, 16351744), (8, 10219840), (10, 8175872), (16, 5109920), (20, 4087936), (32, 2554960), (40, 2043968), (64, 1277480), (80, 1021984), (109, 750080), (128, 638740), (160, 510992), (218, 375040), (256, 319370), (293, 279040), (320, 255496), (436, 187520), (512, 159685), (545, 150016), (586, 139520), (640, 127748), (872, 93760), (1090, 75008), (1172, 69760), (1280, 63874), (1465, 55808), (1744, 46880), (2180, 37504), (2344, 34880), (2560, 31937), (2930, 27904), (3488, 23440), (4360, 18752), (4688, 17440), (5860, 13952), (6976, 11720), (8720, 9376)]