216905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:136

約数の個数: 16

約数和(自身を含む): 290304

約数和(自身を除く): 73399

約数列:

[1, 5, 13, 47, 65, 71, 235, 355, 611, 923, 3055, 3337, 4615, 16685, 43381, 216905]

約数ペア:

[(1, 216905), (5, 43381), (13, 16685), (47, 4615), (65, 3337), (71, 3055), (235, 923), (355, 611)]