21791119

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{2777}}^1$

素因数の和:2862

約数の個数: 16

約数和(自身を含む): 26668800

約数和(自身を除く): 4877681

約数列:

[1, 7, 19, 59, 133, 413, 1121, 2777, 7847, 19439, 52763, 163843, 369341, 1146901, 3113017, 21791119]

約数ペア:

[(1, 21791119), (7, 3113017), (19, 1146901), (59, 369341), (133, 163843), (413, 52763), (1121, 19439), (2777, 7847)]