21007091

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{691}}^1$

素因数の和:842

約数の個数: 16

約数和(自身を含む): 24845568

約数和(自身を除く): 3838477

約数列:

[1, 7, 43, 101, 301, 691, 707, 4343, 4837, 29713, 30401, 69791, 207991, 488537, 3001013, 21007091]

約数ペア:

[(1, 21007091), (7, 3001013), (43, 488537), (101, 207991), (301, 69791), (691, 30401), (707, 29713), (4343, 4837)]