21738409

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1301}}^1$

素因数の和:1357

約数の個数: 24

約数和(自身を含む): 28498176

約数和(自身を除く): 6759767

約数列:

[1, 7, 11, 31, 49, 77, 217, 341, 539, 1301, 1519, 2387, 9107, 14311, 16709, 40331, 63749, 100177, 282317, 443641, 701239, 1976219, 3105487, 21738409]

約数ペア:

[(1, 21738409), (7, 3105487), (11, 1976219), (31, 701239), (49, 443641), (77, 282317), (217, 100177), (341, 63749), (539, 40331), (1301, 16709), (1519, 14311), (2387, 9107)]