20985291

素因数分解:

$3^3\times {\mathrm{19}}^2\times {\mathrm{2153}}^1$

素因数の和:2200

約数の個数: 24

約数和(自身を含む): 32826960

約数和(自身を除く): 11841669

約数列:

[1, 3, 9, 19, 27, 57, 171, 361, 513, 1083, 2153, 3249, 6459, 9747, 19377, 40907, 58131, 122721, 368163, 777233, 1104489, 2331699, 6995097, 20985291]

約数ペア:

[(1, 20985291), (3, 6995097), (9, 2331699), (19, 1104489), (27, 777233), (57, 368163), (171, 122721), (361, 58131), (513, 40907), (1083, 19377), (2153, 9747), (3249, 6459)]