21254559

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{1327}}^1$

素因数の和:1630

約数の個数: 16

約数和(自身を含む): 29959680

約数和(自身を除く): 8705121

約数列:

[1, 3, 19, 57, 281, 843, 1327, 3981, 5339, 16017, 25213, 75639, 372887, 1118661, 7084853, 21254559]

約数ペア:

[(1, 21254559), (3, 7084853), (19, 1118661), (57, 372887), (281, 75639), (843, 25213), (1327, 16017), (3981, 5339)]