21017691

素因数分解:

$3^3\times {\mathrm{311}}^1\times {\mathrm{2503}}^1$

素因数の和:2823

約数の個数: 16

約数和(自身を含む): 31249920

約数和(自身を除く): 10232229

約数列:

[1, 3, 9, 27, 311, 933, 2503, 2799, 7509, 8397, 22527, 67581, 778433, 2335299, 7005897, 21017691]

約数ペア:

[(1, 21017691), (3, 7005897), (9, 2335299), (27, 778433), (311, 67581), (933, 22527), (2503, 8397), (2799, 7509)]