20971587

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{76819}}^1$

素因数の和:76842

約数の個数: 16

約数和(自身を含む): 34415360

約数和(自身を除く): 13443773

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 76819, 230457, 537733, 998647, 1613199, 2995941, 6990529, 20971587]

約数ペア:

[(1, 20971587), (3, 6990529), (7, 2995941), (13, 1613199), (21, 998647), (39, 537733), (91, 230457), (273, 76819)]