21257660

素因数分解:

$2^2\times 5^1\times {\mathrm{353}}^1\times {\mathrm{3011}}^1$

素因数の和:3373

約数の個数: 24

約数和(自身を含む): 44782416

約数和(自身を除く): 23524756

約数列:

[1, 2, 4, 5, 10, 20, 353, 706, 1412, 1765, 3011, 3530, 6022, 7060, 12044, 15055, 30110, 60220, 1062883, 2125766, 4251532, 5314415, 10628830, 21257660]

約数ペア:

[(1, 21257660), (2, 10628830), (4, 5314415), (5, 4251532), (10, 2125766), (20, 1062883), (353, 60220), (706, 30110), (1412, 15055), (1765, 12044), (3011, 7060), (3530, 6022)]