21002877

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7753}}^1$

素因数の和:7809

約数の個数: 24

約数和(自身を含む): 35482304

約数和(自身を除く): 14479427

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7753, 23259, 54271, 69777, 162813, 333379, 488439, 1000137, 2333653, 3000411, 7000959, 21002877]

約数ペア:

[(1, 21002877), (3, 7000959), (7, 3000411), (9, 2333653), (21, 1000137), (43, 488439), (63, 333379), (129, 162813), (301, 69777), (387, 54271), (903, 23259), (2709, 7753)]