20981500

素因数分解:

$2^2\times 5^3\times {\mathrm{29}}^1\times {\mathrm{1447}}^1$

素因数の和:1495

約数の個数: 48

約数和(自身を含む): 47436480

約数和(自身を除く): 26454980

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 100, 116, 125, 145, 250, 290, 500, 580, 725, 1447, 1450, 2894, 2900, 3625, 5788, 7235, 7250, 14470, 14500, 28940, 36175, 41963, 72350, 83926, 144700, 167852, 180875, 209815, 361750, 419630, 723500, 839260, 1049075, 2098150, 4196300, 5245375, 10490750, 20981500]

約数ペア:

[(1, 20981500), (2, 10490750), (4, 5245375), (5, 4196300), (10, 2098150), (20, 1049075), (25, 839260), (29, 723500), (50, 419630), (58, 361750), (100, 209815), (116, 180875), (125, 167852), (145, 144700), (250, 83926), (290, 72350), (500, 41963), (580, 36175), (725, 28940), (1447, 14500), (1450, 14470), (2894, 7250), (2900, 7235), (3625, 5788)]