21555919

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{2137}}^1$

素因数の和:2286

約数の個数: 16

約数和(自身を含む): 27092736

約数和(自身を除く): 5536817

約数列:

[1, 7, 11, 77, 131, 917, 1441, 2137, 10087, 14959, 23507, 164549, 279947, 1959629, 3079417, 21555919]

約数ペア:

[(1, 21555919), (7, 3079417), (11, 1959629), (77, 279947), (131, 164549), (917, 23507), (1441, 14959), (2137, 10087)]