21731297

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^2\times {\mathrm{73}}^1$

素因数の和:189

約数の個数: 24

約数和(自身を含む): 26895744

約数和(自身を除く): 5164447

約数列:

[1, 7, 23, 43, 73, 161, 301, 511, 989, 1679, 1849, 3139, 6923, 11753, 12943, 21973, 42527, 72197, 134977, 297689, 505379, 944839, 3104471, 21731297]

約数ペア:

[(1, 21731297), (7, 3104471), (23, 944839), (43, 505379), (73, 297689), (161, 134977), (301, 72197), (511, 42527), (989, 21973), (1679, 12943), (1849, 11753), (3139, 6923)]