21720203

素因数分解:

${\mathrm{17}}^1\times {\mathrm{43}}^2\times {\mathrm{691}}^1$

素因数の和:794

約数の個数: 12

約数和(自身を含む): 23579208

約数和(自身を除く): 1859005

約数列:

[1, 17, 43, 691, 731, 1849, 11747, 29713, 31433, 505121, 1277659, 21720203]

約数ペア:

[(1, 21720203), (17, 1277659), (43, 505121), (691, 31433), (731, 29713), (1849, 11747)]