21709121

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{1061}}^1$

素因数の和:1184

約数の個数: 16

約数和(自身を含む): 25827840

約数和(自身を除く): 4118719

約数列:

[1, 7, 37, 79, 259, 553, 1061, 2923, 7427, 20461, 39257, 83819, 274799, 586733, 3101303, 21709121]

約数ペア:

[(1, 21709121), (7, 3101303), (37, 586733), (79, 274799), (259, 83819), (553, 39257), (1061, 20461), (2923, 7427)]