20784253

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{521}}^1$

素因数の和:708

約数の個数: 16

約数和(自身を含む): 24554880

約数和(自身を除く): 3770627

約数列:

[1, 7, 41, 139, 287, 521, 973, 3647, 5699, 21361, 39893, 72419, 149527, 506933, 2969179, 20784253]

約数ペア:

[(1, 20784253), (7, 2969179), (41, 506933), (139, 149527), (287, 72419), (521, 39893), (973, 21361), (3647, 5699)]