21701781

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{709}}^1$

素因数の和:913

約数の個数: 24

約数和(自身を含む): 33228000

約数和(自身を除く): 11526219

約数列:

[1, 3, 9, 19, 57, 171, 179, 537, 709, 1611, 2127, 3401, 6381, 10203, 13471, 30609, 40413, 121239, 126911, 380733, 1142199, 2411309, 7233927, 21701781]

約数ペア:

[(1, 21701781), (3, 7233927), (9, 2411309), (19, 1142199), (57, 380733), (171, 126911), (179, 121239), (537, 40413), (709, 30609), (1611, 13471), (2127, 10203), (3401, 6381)]