20405518

素因数分解:

$2^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{4129}}^1$

素因数の和:4491

約数の個数: 16

約数和(自身を含む): 35088480

約数和(自身を除く): 14682962

約数列:

[1, 2, 7, 14, 353, 706, 2471, 4129, 4942, 8258, 28903, 57806, 1457537, 2915074, 10202759, 20405518]

約数ペア:

[(1, 20405518), (2, 10202759), (7, 2915074), (14, 1457537), (353, 57806), (706, 28903), (2471, 8258), (4129, 4942)]