20704887

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7643}}^1$

素因数の和:7699

約数の個数: 24

約数和(自身を含む): 34978944

約数和(自身を除く): 14274057

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7643, 22929, 53501, 68787, 160503, 328649, 481509, 985947, 2300543, 2957841, 6901629, 20704887]

約数ペア:

[(1, 20704887), (3, 6901629), (7, 2957841), (9, 2300543), (21, 985947), (43, 481509), (63, 328649), (129, 160503), (301, 68787), (387, 53501), (903, 22929), (2709, 7643)]