21969805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{30727}}^1$

素因数の和:30756

約数の個数: 16

約数和(自身を含む): 30973824

約数和(自身を除く): 9004019

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 30727, 153635, 337997, 399451, 1689985, 1997255, 4393961, 21969805]

約数ペア:

[(1, 21969805), (5, 4393961), (11, 1997255), (13, 1689985), (55, 399451), (65, 337997), (143, 153635), (715, 30727)]