18991707

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7121}}^1$

素因数の和:7258

約数の個数: 16

約数和(自身を含む): 29171712

約数和(自身を除く): 10180005

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7121, 21363, 49847, 149541, 904367, 2713101, 6330569, 18991707]

約数ペア:

[(1, 18991707), (3, 6330569), (7, 2713101), (21, 904367), (127, 149541), (381, 49847), (889, 21363), (2667, 7121)]