640186

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{991}}^1$

素因数の和:1029

約数の個数: 16

約数和(自身を含む): 1071360

約数和(自身を除く): 431174

約数列:

[1, 2, 17, 19, 34, 38, 323, 646, 991, 1982, 16847, 18829, 33694, 37658, 320093, 640186]

約数ペア:

[(1, 640186), (2, 320093), (17, 37658), (19, 33694), (34, 18829), (38, 16847), (323, 1982), (646, 991)]