18920990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{172009}}^1$

素因数の和:172027

約数の個数: 16

約数和(自身を含む): 37154160

約数和(自身を除く): 18233170

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 172009, 344018, 860045, 1720090, 1892099, 3784198, 9460495, 18920990]

約数ペア:

[(1, 18920990), (2, 9460495), (5, 3784198), (10, 1892099), (11, 1720090), (22, 860045), (55, 344018), (110, 172009)]