21119119

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{1117}}^1$

素因数の和:1234

約数の個数: 16

約数和(自身を含む): 25150528

約数和(自身を除く): 4031409

約数列:

[1, 7, 37, 73, 259, 511, 1117, 2701, 7819, 18907, 41329, 81541, 289303, 570787, 3017017, 21119119]

約数ペア:

[(1, 21119119), (7, 3017017), (37, 570787), (73, 289303), (259, 81541), (511, 41329), (1117, 18907), (2701, 7819)]