21004155

素因数分解:

$3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3407}}^1$

素因数の和:3555

約数の個数: 24

約数和(自身を含む): 36683712

約数和(自身を除く): 15679557

約数列:

[1, 3, 5, 9, 15, 45, 137, 411, 685, 1233, 2055, 3407, 6165, 10221, 17035, 30663, 51105, 153315, 466759, 1400277, 2333795, 4200831, 7001385, 21004155]

約数ペア:

[(1, 21004155), (3, 7001385), (5, 4200831), (9, 2333795), (15, 1400277), (45, 466759), (137, 153315), (411, 51105), (685, 30663), (1233, 17035), (2055, 10221), (3407, 6165)]