1991143

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1361}}^1$

素因数の和:1398

約数の個数: 16

約数和(自身を含む): 2615040

約数和(自身を除く): 623897

約数列:

[1, 7, 11, 19, 77, 133, 209, 1361, 1463, 9527, 14971, 25859, 104797, 181013, 284449, 1991143]

約数ペア:

[(1, 1991143), (7, 284449), (11, 181013), (19, 104797), (77, 25859), (133, 14971), (209, 9527), (1361, 1463)]