21266721

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4273}}^1$

素因数の和:4365

約数の個数: 24

約数和(自身を含む): 35559680

約数和(自身を除く): 14292959

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4273, 4977, 12819, 29911, 38457, 89733, 269199, 337567, 1012701, 2362969, 3038103, 7088907, 21266721]

約数ペア:

[(1, 21266721), (3, 7088907), (7, 3038103), (9, 2362969), (21, 1012701), (63, 337567), (79, 269199), (237, 89733), (553, 38457), (711, 29911), (1659, 12819), (4273, 4977)]