81660397

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{509}}^1$

素因数の和:613

約数の個数: 32

約数和(自身を含む): 105557760

約数和(自身を除く): 23897363

約数列:

[1, 7, 13, 41, 43, 91, 287, 301, 509, 533, 559, 1763, 3563, 3731, 3913, 6617, 12341, 20869, 21887, 22919, 46319, 146083, 153209, 160433, 271297, 284531, 897367, 1899079, 1991717, 6281569, 11665771, 81660397]

約数ペア:

[(1, 81660397), (7, 11665771), (13, 6281569), (41, 1991717), (43, 1899079), (91, 897367), (287, 284531), (301, 271297), (509, 160433), (533, 153209), (559, 146083), (1763, 46319), (3563, 22919), (3731, 21887), (3913, 20869), (6617, 12341)]