20971208

素因数分解:

$2^3\times {\mathrm{139}}^1\times {\mathrm{18859}}^1$

素因数の和:19004

約数の個数: 16

約数和(自身を含む): 39606000

約数和(自身を除く): 18634792

約数列:

[1, 2, 4, 8, 139, 278, 556, 1112, 18859, 37718, 75436, 150872, 2621401, 5242802, 10485604, 20971208]

約数ペア:

[(1, 20971208), (2, 10485604), (4, 5242802), (8, 2621401), (139, 150872), (278, 75436), (556, 37718), (1112, 18859)]