20947293

素因数分解:

$3^2\times {\mathrm{109}}^1\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:409

約数の個数: 24

約数和(自身を含む): 30956640

約数和(自身を除く): 10009347

約数列:

[1, 3, 9, 109, 131, 163, 327, 393, 489, 981, 1179, 1467, 14279, 17767, 21353, 42837, 53301, 64059, 128511, 159903, 192177, 2327477, 6982431, 20947293]

約数ペア:

[(1, 20947293), (3, 6982431), (9, 2327477), (109, 192177), (131, 159903), (163, 128511), (327, 64059), (393, 53301), (489, 42837), (981, 21353), (1179, 17767), (1467, 14279)]