19718759

素因数分解:

${\mathrm{17}}^2\times {\mathrm{31}}^2\times {\mathrm{71}}^1$

素因数の和:167

約数の個数: 18

約数和(自身を含む): 21949272

約数和(自身を除く): 2230513

約数列:

[1, 17, 31, 71, 289, 527, 961, 1207, 2201, 8959, 16337, 20519, 37417, 68231, 277729, 636089, 1159927, 19718759]

約数ペア:

[(1, 19718759), (17, 1159927), (31, 636089), (71, 277729), (289, 68231), (527, 37417), (961, 20519), (1207, 16337), (2201, 8959)]