20690559

素因数分解:

$3^4\times {\mathrm{157}}^1\times {\mathrm{1627}}^1$

素因数の和:1796

約数の個数: 20

約数和(自身を含む): 31124104

約数和(自身を除く): 10433545

約数列:

[1, 3, 9, 27, 81, 157, 471, 1413, 1627, 4239, 4881, 12717, 14643, 43929, 131787, 255439, 766317, 2298951, 6896853, 20690559]

約数ペア:

[(1, 20690559), (3, 6896853), (9, 2298951), (27, 766317), (81, 255439), (157, 131787), (471, 43929), (1413, 14643), (1627, 12717), (4239, 4881)]