81218781

素因数分解:

$3^4\times 7^1\times {\mathrm{143243}}^1$

素因数の和:143262

約数の個数: 20

約数和(自身を含む): 138660192

約数和(自身を除く): 57441411

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 143243, 429729, 1002701, 1289187, 3008103, 3867561, 9024309, 11602683, 27072927, 81218781]

約数ペア:

[(1, 81218781), (3, 27072927), (7, 11602683), (9, 9024309), (21, 3867561), (27, 3008103), (63, 1289187), (81, 1002701), (189, 429729), (567, 143243)]