21513519

素因数分解:

$3^9\times {\mathrm{1093}}^1$

素因数の和:1120

約数の個数: 20

約数和(自身を含む): 32299256

約数和(自身を除く): 10785737

約数列:

[1, 3, 9, 27, 81, 243, 729, 1093, 2187, 3279, 6561, 9837, 19683, 29511, 88533, 265599, 796797, 2390391, 7171173, 21513519]

約数ペア:

[(1, 21513519), (3, 7171173), (9, 2390391), (27, 796797), (81, 265599), (243, 88533), (729, 29511), (1093, 19683), (2187, 9837), (3279, 6561)]