19780943

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{727}}^1$

素因数の和:783

約数の個数: 24

約数和(自身を含む): 25579008

約数和(自身を除く): 5798065

約数列:

[1, 7, 13, 23, 91, 161, 169, 299, 727, 1183, 2093, 3887, 5089, 9451, 16721, 27209, 66157, 117047, 122863, 217373, 860041, 1521611, 2825849, 19780943]

約数ペア:

[(1, 19780943), (7, 2825849), (13, 1521611), (23, 860041), (91, 217373), (161, 122863), (169, 117047), (299, 66157), (727, 27209), (1183, 16721), (2093, 9451), (3887, 5089)]