20855825

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{83}}^1$

素因数の和:158

約数の個数: 36

約数和(自身を含む): 28800240

約数和(自身を除く): 7944415

約数列:

[1, 5, 19, 23, 25, 83, 95, 115, 415, 437, 475, 529, 575, 1577, 1909, 2075, 2185, 2645, 7885, 9545, 10051, 10925, 13225, 36271, 39425, 43907, 47725, 50255, 181355, 219535, 251275, 834233, 906775, 1097675, 4171165, 20855825]

約数ペア:

[(1, 20855825), (5, 4171165), (19, 1097675), (23, 906775), (25, 834233), (83, 251275), (95, 219535), (115, 181355), (415, 50255), (437, 47725), (475, 43907), (529, 39425), (575, 36271), (1577, 13225), (1909, 10925), (2075, 10051), (2185, 9545), (2645, 7885)]