21907881

素因数分解:

$3^3\times {\mathrm{127}}^1\times {\mathrm{6389}}^1$

素因数の和:6525

約数の個数: 16

約数和(自身を含む): 32716800

約数和(自身を除く): 10808919

約数列:

[1, 3, 9, 27, 127, 381, 1143, 3429, 6389, 19167, 57501, 172503, 811403, 2434209, 7302627, 21907881]

約数ペア:

[(1, 21907881), (3, 7302627), (9, 2434209), (27, 811403), (127, 172503), (381, 57501), (1143, 19167), (3429, 6389)]