20723787

素因数分解:

$3^2\times 7^1\times {\mathrm{211}}^1\times {\mathrm{1559}}^1$

素因数の和:1783

約数の個数: 24

約数和(自身を含む): 34394880

約数和(自身を除く): 13671093

約数列:

[1, 3, 7, 9, 21, 63, 211, 633, 1477, 1559, 1899, 4431, 4677, 10913, 13293, 14031, 32739, 98217, 328949, 986847, 2302643, 2960541, 6907929, 20723787]

約数ペア:

[(1, 20723787), (3, 6907929), (7, 2960541), (9, 2302643), (21, 986847), (63, 328949), (211, 98217), (633, 32739), (1477, 14031), (1559, 13293), (1899, 10913), (4431, 4677)]