20406519

素因数分解:

$3^3\times 7^1\times {\mathrm{107971}}^1$

素因数の和:107987

約数の個数: 16

約数和(自身を含む): 34551040

約数和(自身を除く): 14144521

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 107971, 323913, 755797, 971739, 2267391, 2915217, 6802173, 20406519]

約数ペア:

[(1, 20406519), (3, 6802173), (7, 2915217), (9, 2267391), (21, 971739), (27, 755797), (63, 323913), (189, 107971)]