21505203

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18523}}^1$

素因数の和:18575

約数の個数: 16

約数和(自身を含む): 32602240

約数和(自身を除く): 11097037

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18523, 55569, 166707, 500121, 796489, 2389467, 7168401, 21505203]

約数ペア:

[(1, 21505203), (3, 7168401), (9, 2389467), (27, 796489), (43, 500121), (129, 166707), (387, 55569), (1161, 18523)]