21080391

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{3863}}^1$

素因数の和:3990

約数の個数: 16

約数和(自身を含む): 30046464

約数和(自身を除く): 8966073

約数列:

[1, 3, 17, 51, 107, 321, 1819, 3863, 5457, 11589, 65671, 197013, 413341, 1240023, 7026797, 21080391]

約数ペア:

[(1, 21080391), (3, 7026797), (17, 1240023), (51, 413341), (107, 197013), (321, 65671), (1819, 11589), (3863, 5457)]