19728207681

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2887}}^1\times {\mathrm{25031}}^1$

素因数の和:27941

約数の個数: 32

約数和(自身を含む): 32387002368

約数和(自身を除く): 12658794687

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 2887, 8661, 20209, 25031, 37531, 60627, 75093, 112593, 175217, 262717, 325403, 525651, 788151, 976209, 2277821, 6833463, 72264497, 216793491, 505851479, 939438461, 1517554437, 2818315383, 6576069227, 19728207681]

約数ペア:

[(1, 19728207681), (3, 6576069227), (7, 2818315383), (13, 1517554437), (21, 939438461), (39, 505851479), (91, 216793491), (273, 72264497), (2887, 6833463), (8661, 2277821), (20209, 976209), (25031, 788151), (37531, 525651), (60627, 325403), (75093, 262717), (112593, 175217)]