20996440

素因数分解:

$2^3\times 5^1\times {\mathrm{353}}^1\times {\mathrm{1487}}^1$

素因数の和:1851

約数の個数: 32

約数和(自身を含む): 47407680

約数和(自身を除く): 26411240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 353, 706, 1412, 1487, 1765, 2824, 2974, 3530, 5948, 7060, 7435, 11896, 14120, 14870, 29740, 59480, 524911, 1049822, 2099644, 2624555, 4199288, 5249110, 10498220, 20996440]

約数ペア:

[(1, 20996440), (2, 10498220), (4, 5249110), (5, 4199288), (8, 2624555), (10, 2099644), (20, 1049822), (40, 524911), (353, 59480), (706, 29740), (1412, 14870), (1487, 14120), (1765, 11896), (2824, 7435), (2974, 7060), (3530, 5948)]