21031423

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{5101}}^1$

素因数の和:5158

約数の個数: 16

約数和(自身を含む): 26122240

約数和(自身を除く): 5090817

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 5101, 35707, 96919, 158131, 678433, 1106917, 3004489, 21031423]

約数ペア:

[(1, 21031423), (7, 3004489), (19, 1106917), (31, 678433), (133, 158131), (217, 96919), (589, 35707), (4123, 5101)]