20806821

素因数分解:

$3^3\times 7^2\times {\mathrm{15727}}^1$

素因数の和:15750

約数の個数: 24

約数和(自身を含む): 35859840

約数和(自身を除く): 15053019

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15727, 47181, 110089, 141543, 330267, 424629, 770623, 990801, 2311869, 2972403, 6935607, 20806821]

約数ペア:

[(1, 20806821), (3, 6935607), (7, 2972403), (9, 2311869), (21, 990801), (27, 770623), (49, 424629), (63, 330267), (147, 141543), (189, 110089), (441, 47181), (1323, 15727)]