20971538

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{65129}}^1$

素因数の和:65161

約数の個数: 16

約数和(自身を含む): 37514880

約数和(自身を除く): 16543342

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 65129, 130258, 455903, 911806, 1497967, 2995934, 10485769, 20971538]

約数ペア:

[(1, 20971538), (2, 10485769), (7, 2995934), (14, 1497967), (23, 911806), (46, 455903), (161, 130258), (322, 65129)]