20993721

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9343}}^1$

素因数の和:9460

約数の個数: 16

約数和(自身を含む): 32292864

約数和(自身を除く): 11299143

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9343, 28029, 65401, 196203, 999701, 2999103, 6997907, 20993721]

約数ペア:

[(1, 20993721), (3, 6997907), (7, 2999103), (21, 999701), (107, 196203), (321, 65401), (749, 28029), (2247, 9343)]