217590505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{55721}}^1$

素因数の和:55808

約数の個数: 16

約数和(自身を含む): 288862848

約数和(自身を除く): 71272343

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 55721, 278605, 612931, 3064655, 3956191, 19780955, 43518101, 217590505]

約数ペア:

[(1, 217590505), (5, 43518101), (11, 19780955), (55, 3956191), (71, 3064655), (355, 612931), (781, 278605), (3905, 55721)]