205180520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{119291}}^1$

素因数の和:119345

約数の個数: 32

約数和(自身を含む): 472396320

約数和(自身を除く): 267215800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 119291, 238582, 477164, 596455, 954328, 1192910, 2385820, 4771640, 5129513, 10259026, 20518052, 25647565, 41036104, 51295130, 102590260, 205180520]

約数ペア:

[(1, 205180520), (2, 102590260), (4, 51295130), (5, 41036104), (8, 25647565), (10, 20518052), (20, 10259026), (40, 5129513), (43, 4771640), (86, 2385820), (172, 1192910), (215, 954328), (344, 596455), (430, 477164), (860, 238582), (1720, 119291)]