28057281

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{3701}}^1$

素因数の和:3749

約数の個数: 24

約数和(自身を含む): 45134784

約数和(自身を除く): 17077503

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 3701, 7581, 11103, 25907, 70319, 77721, 210957, 492233, 1336061, 1476699, 4008183, 9352427, 28057281]

約数ペア:

[(1, 28057281), (3, 9352427), (7, 4008183), (19, 1476699), (21, 1336061), (57, 492233), (133, 210957), (361, 77721), (399, 70319), (1083, 25907), (2527, 11103), (3701, 7581)]