19905193

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{269}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 25738560

約数和(自身を除く): 5833367

約数列:

[1, 7, 11, 31, 77, 217, 269, 341, 961, 1883, 2387, 2959, 6727, 8339, 10571, 20713, 58373, 73997, 91729, 258509, 642103, 1809563, 2843599, 19905193]

約数ペア:

[(1, 19905193), (7, 2843599), (11, 1809563), (31, 642103), (77, 258509), (217, 91729), (269, 73997), (341, 58373), (961, 20713), (1883, 10571), (2387, 8339), (2959, 6727)]