21757708

素因数分解:

$2^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{7129}}^1$

素因数の和:7249

約数の個数: 24

約数和(自身を含む): 43920800

約数和(自身を除く): 22163092

約数列:

[1, 2, 4, 7, 14, 28, 109, 218, 436, 763, 1526, 3052, 7129, 14258, 28516, 49903, 99806, 199612, 777061, 1554122, 3108244, 5439427, 10878854, 21757708]

約数ペア:

[(1, 21757708), (2, 10878854), (4, 5439427), (7, 3108244), (14, 1554122), (28, 777061), (109, 199612), (218, 99806), (436, 49903), (763, 28516), (1526, 14258), (3052, 7129)]