20420351

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{677}}^1$

素因数の和:854

約数の個数: 16

約数和(自身を含む): 24299520

約数和(自身を除く): 3879169

約数列:

[1, 7, 31, 139, 217, 677, 973, 4309, 4739, 20987, 30163, 94103, 146909, 658721, 2917193, 20420351]

約数ペア:

[(1, 20420351), (7, 2917193), (31, 658721), (139, 146909), (217, 94103), (677, 30163), (973, 20987), (4309, 4739)]