21228361

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{353}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 27119232

約数和(自身を除く): 5890871

約数列:

[1, 7, 11, 71, 77, 121, 353, 497, 781, 847, 2471, 3883, 5467, 8591, 25063, 27181, 42713, 60137, 175441, 275693, 298991, 1929851, 3032623, 21228361]

約数ペア:

[(1, 21228361), (7, 3032623), (11, 1929851), (71, 298991), (77, 275693), (121, 175441), (353, 60137), (497, 42713), (781, 27181), (847, 25063), (2471, 8591), (3883, 5467)]