20726511

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{337}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 31799040

約数和(自身を除く): 11072529

約数列:

[1, 3, 13, 19, 39, 57, 83, 247, 249, 337, 741, 1011, 1079, 1577, 3237, 4381, 4731, 6403, 13143, 19209, 20501, 27971, 61503, 83239, 83913, 249717, 363623, 531449, 1090869, 1594347, 6908837, 20726511]

約数ペア:

[(1, 20726511), (3, 6908837), (13, 1594347), (19, 1090869), (39, 531449), (57, 363623), (83, 249717), (247, 83913), (249, 83239), (337, 61503), (741, 27971), (1011, 20501), (1079, 19209), (1577, 13143), (3237, 6403), (4381, 4731)]