8720440

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{701}}^1$

素因数の和:1023

約数の個数: 32

約数和(自身を含む): 19712160

約数和(自身を除く): 10991720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 701, 1244, 1402, 1555, 2488, 2804, 3110, 3505, 5608, 6220, 7010, 12440, 14020, 28040, 218011, 436022, 872044, 1090055, 1744088, 2180110, 4360220, 8720440]

約数ペア:

[(1, 8720440), (2, 4360220), (4, 2180110), (5, 1744088), (8, 1090055), (10, 872044), (20, 436022), (40, 218011), (311, 28040), (622, 14020), (701, 12440), (1244, 7010), (1402, 6220), (1555, 5608), (2488, 3505), (2804, 3110)]