19901819

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{1787}}^1$

素因数の和:1874

約数の個数: 16

約数和(自身を含む): 23916288

約数和(自身を除く): 4014469

約数列:

[1, 7, 37, 43, 259, 301, 1591, 1787, 11137, 12509, 66119, 76841, 462833, 537887, 2843117, 19901819]

約数ペア:

[(1, 19901819), (7, 2843117), (37, 537887), (43, 462833), (259, 76841), (301, 66119), (1591, 12509), (1787, 11137)]