28897281

素因数分解:

$3^2\times 7^1\times {\mathrm{229}}^1\times {\mathrm{2003}}^1$

素因数の和:2245

約数の個数: 24

約数和(自身を含む): 47935680

約数和(自身を除く): 19038399

約数列:

[1, 3, 7, 9, 21, 63, 229, 687, 1603, 2003, 2061, 4809, 6009, 14021, 14427, 18027, 42063, 126189, 458687, 1376061, 3210809, 4128183, 9632427, 28897281]

約数ペア:

[(1, 28897281), (3, 9632427), (7, 4128183), (9, 3210809), (21, 1376061), (63, 458687), (229, 126189), (687, 42063), (1603, 18027), (2003, 14427), (2061, 14021), (4809, 6009)]