81991259

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{27431}}^1$

素因数の和:27506

約数の個数: 12

約数和(自身を含む): 96944688

約数和(自身を除く): 14953429

約数列:

[1, 7, 49, 61, 427, 2989, 27431, 192017, 1344119, 1673291, 11713037, 81991259]

約数ペア:

[(1, 81991259), (7, 11713037), (49, 1673291), (61, 1344119), (427, 192017), (2989, 27431)]