21061271

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{6361}}^1$

素因数の和:6422

約数の個数: 16

約数和(自身を含む): 26873088

約数和(自身を除く): 5811817

約数列:

[1, 7, 11, 43, 77, 301, 473, 3311, 6361, 44527, 69971, 273523, 489797, 1914661, 3008753, 21061271]

約数ペア:

[(1, 21061271), (7, 3008753), (11, 1914661), (43, 489797), (77, 273523), (301, 69971), (473, 44527), (3311, 6361)]