19786389

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{20047}}^1$

素因数の和:20104

約数の個数: 16

約数和(自身を含む): 30793728

約数和(自身を除く): 11007339

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 20047, 60141, 140329, 420987, 942209, 2826627, 6595463, 19786389]

約数ペア:

[(1, 19786389), (3, 6595463), (7, 2826627), (21, 942209), (47, 420987), (141, 140329), (329, 60141), (987, 20047)]