20042721

素因数分解:

$3^4\times {\mathrm{349}}^1\times {\mathrm{709}}^1$

素因数の和:1070

約数の個数: 20

約数和(自身を含む): 30068500

約数和(自身を除く): 10025779

約数列:

[1, 3, 9, 27, 81, 349, 709, 1047, 2127, 3141, 6381, 9423, 19143, 28269, 57429, 247441, 742323, 2226969, 6680907, 20042721]

約数ペア:

[(1, 20042721), (3, 6680907), (9, 2226969), (27, 742323), (81, 247441), (349, 57429), (709, 28269), (1047, 19143), (2127, 9423), (3141, 6381)]