19688109

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{21803}}^1$

素因数の和:21856

約数の個数: 16

約数和(自身を含む): 30700032

約数和(自身を除く): 11011923

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 21803, 65409, 152621, 457863, 937529, 2812587, 6562703, 19688109]

約数ペア:

[(1, 19688109), (3, 6562703), (7, 2812587), (21, 937529), (43, 457863), (129, 152621), (301, 65409), (903, 21803)]