21400393

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{1559}}^1$

素因数の和:1656

約数の個数: 16

約数和(自身を含む): 25608960

約数和(自身を除く): 4208567

約数列:

[1, 7, 37, 53, 259, 371, 1559, 1961, 10913, 13727, 57683, 82627, 403781, 578389, 3057199, 21400393]

約数ペア:

[(1, 21400393), (7, 3057199), (37, 578389), (53, 403781), (259, 82627), (371, 57683), (1559, 13727), (1961, 10913)]