20778172

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{2087}}^1$

素因数の和:2241

約数の個数: 24

約数和(自身を含む): 38586240

約数和(自身を除く): 17808068

約数列:

[1, 2, 4, 19, 38, 76, 131, 262, 524, 2087, 2489, 4174, 4978, 8348, 9956, 39653, 79306, 158612, 273397, 546794, 1093588, 5194543, 10389086, 20778172]

約数ペア:

[(1, 20778172), (2, 10389086), (4, 5194543), (19, 1093588), (38, 546794), (76, 273397), (131, 158612), (262, 79306), (524, 39653), (2087, 9956), (2489, 8348), (4174, 4978)]