21058389

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{347}}^1\times {\mathrm{613}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 33332832

約数和(自身を除く): 12274443

約数列:

[1, 3, 9, 11, 33, 99, 347, 613, 1041, 1839, 3123, 3817, 5517, 6743, 11451, 20229, 34353, 60687, 212711, 638133, 1914399, 2339821, 7019463, 21058389]

約数ペア:

[(1, 21058389), (3, 7019463), (9, 2339821), (11, 1914399), (33, 638133), (99, 212711), (347, 60687), (613, 34353), (1041, 20229), (1839, 11451), (3123, 6743), (3817, 5517)]