20947689

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19559}}^1$

素因数の和:19589

約数の個数: 24

約数和(自身を含む): 36616320

約数和(自身を除く): 15668631

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19559, 58677, 136913, 176031, 332503, 410739, 997509, 1232217, 2327521, 2992527, 6982563, 20947689]

約数ペア:

[(1, 20947689), (3, 6982563), (7, 2992527), (9, 2327521), (17, 1232217), (21, 997509), (51, 410739), (63, 332503), (119, 176031), (153, 136913), (357, 58677), (1071, 19559)]