21515523

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{9811}}^1$

素因数の和:9874

約数の個数: 16

約数和(自身を含む): 31084416

約数和(自身を除く): 9568893

約数列:

[1, 3, 17, 43, 51, 129, 731, 2193, 9811, 29433, 166787, 421873, 500361, 1265619, 7171841, 21515523]

約数ペア:

[(1, 21515523), (3, 7171841), (17, 1265619), (43, 500361), (51, 421873), (129, 166787), (731, 29433), (2193, 9811)]