218431353

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{28813}}^1$

素因数の和:28861

約数の個数: 24

約数和(自身を含む): 351300288

約数和(自身を除く): 132868935

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 7581, 28813, 86439, 201691, 547447, 605073, 1642341, 3832129, 10401493, 11496387, 31204479, 72810451, 218431353]

約数ペア:

[(1, 218431353), (3, 72810451), (7, 31204479), (19, 11496387), (21, 10401493), (57, 3832129), (133, 1642341), (361, 605073), (399, 547447), (1083, 201691), (2527, 86439), (7581, 28813)]