20638828

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{15683}}^1$

素因数の和:15741

約数の個数: 24

約数和(自身を含む): 42158592

約数和(自身を除く): 21519764

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 188, 329, 658, 1316, 15683, 31366, 62732, 109781, 219562, 439124, 737101, 1474202, 2948404, 5159707, 10319414, 20638828]

約数ペア:

[(1, 20638828), (2, 10319414), (4, 5159707), (7, 2948404), (14, 1474202), (28, 737101), (47, 439124), (94, 219562), (188, 109781), (329, 62732), (658, 31366), (1316, 15683)]