81282717

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{389}}^1$

素因数の和:578

約数の個数: 32

約数和(自身を含む): 123552000

約数和(自身を除く): 42269283

約数列:

[1, 3, 9, 27, 71, 109, 213, 327, 389, 639, 981, 1167, 1917, 2943, 3501, 7739, 10503, 23217, 27619, 42401, 69651, 82857, 127203, 208953, 248571, 381609, 745713, 1144827, 3010471, 9031413, 27094239, 81282717]

約数ペア:

[(1, 81282717), (3, 27094239), (9, 9031413), (27, 3010471), (71, 1144827), (109, 745713), (213, 381609), (327, 248571), (389, 208953), (639, 127203), (981, 82857), (1167, 69651), (1917, 42401), (2943, 27619), (3501, 23217), (7739, 10503)]