19902009

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{191}}^1\times {\mathrm{739}}^1$

素因数の和:980

約数の個数: 16

約数和(自身を含む): 27279360

約数和(自身を除く): 7377351

約数列:

[1, 3, 47, 141, 191, 573, 739, 2217, 8977, 26931, 34733, 104199, 141149, 423447, 6634003, 19902009]

約数ペア:

[(1, 19902009), (3, 6634003), (47, 423447), (141, 141149), (191, 104199), (573, 34733), (739, 26931), (2217, 8977)]