21385749

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2153}}^1$

素因数の和:2217

約数の個数: 32

約数和(自身を含む): 36393984

約数和(自身を除く): 15008235

約数列:

[1, 3, 7, 11, 21, 33, 43, 77, 129, 231, 301, 473, 903, 1419, 2153, 3311, 6459, 9933, 15071, 23683, 45213, 71049, 92579, 165781, 277737, 497343, 648053, 1018369, 1944159, 3055107, 7128583, 21385749]

約数ペア:

[(1, 21385749), (3, 7128583), (7, 3055107), (11, 1944159), (21, 1018369), (33, 648053), (43, 497343), (77, 277737), (129, 165781), (231, 92579), (301, 71049), (473, 45213), (903, 23683), (1419, 15071), (2153, 9933), (3311, 6459)]