205207720

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{11903}}^1$

素因数の和:12345

約数の個数: 32

約数和(自身を含む): 462827520

約数和(自身を除く): 257619800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1724, 2155, 3448, 4310, 8620, 11903, 17240, 23806, 47612, 59515, 95224, 119030, 238060, 476120, 5130193, 10260386, 20520772, 25650965, 41041544, 51301930, 102603860, 205207720]

約数ペア:

[(1, 205207720), (2, 102603860), (4, 51301930), (5, 41041544), (8, 25650965), (10, 20520772), (20, 10260386), (40, 5130193), (431, 476120), (862, 238060), (1724, 119030), (2155, 95224), (3448, 59515), (4310, 47612), (8620, 23806), (11903, 17240)]