21129647

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{2003}}^1$

素因数の和:2158

約数の個数: 16

約数和(自身を含む): 26548992

約数和(自身を除く): 5419345

約数列:

[1, 7, 11, 77, 137, 959, 1507, 2003, 10549, 14021, 22033, 154231, 274411, 1920877, 3018521, 21129647]

約数ペア:

[(1, 21129647), (7, 3018521), (11, 1920877), (77, 274411), (137, 154231), (959, 22033), (1507, 14021), (2003, 10549)]