21528717

素因数分解:

$3^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{3701}}^1$

素因数の和:3988

約数の個数: 16

約数和(自身を含む): 32932992

約数和(自身を除く): 11404275

約数列:

[1, 3, 7, 21, 277, 831, 1939, 3701, 5817, 11103, 25907, 77721, 1025177, 3075531, 7176239, 21528717]

約数ペア:

[(1, 21528717), (3, 7176239), (7, 3075531), (21, 1025177), (277, 77721), (831, 25907), (1939, 11103), (3701, 5817)]