21578389

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{4217}}^1$

素因数の和:4284

約数の個数: 16

約数和(自身を含む): 26725248

約数和(自身を除く): 5146859

約数列:

[1, 7, 17, 43, 119, 301, 731, 4217, 5117, 29519, 71689, 181331, 501823, 1269317, 3082627, 21578389]

約数ペア:

[(1, 21578389), (7, 3082627), (17, 1269317), (43, 501823), (119, 181331), (301, 71689), (731, 29519), (4217, 5117)]