81019869

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 136249344

約数和(自身を除く): 55229475

約数列:

[1, 3, 7, 21, 23, 43, 47, 69, 83, 129, 141, 161, 249, 301, 329, 483, 581, 903, 987, 989, 1081, 1743, 1909, 2021, 2967, 3243, 3569, 3901, 5727, 6063, 6923, 7567, 10707, 11703, 13363, 14147, 20769, 22701, 24983, 27307, 40089, 42441, 46483, 74949, 81921, 82087, 89723, 139449, 167743, 246261, 269169, 325381, 503229, 574609, 628061, 976143, 1174201, 1723827, 1884183, 3522603, 3858089, 11574267, 27006623, 81019869]

約数ペア:

[(1, 81019869), (3, 27006623), (7, 11574267), (21, 3858089), (23, 3522603), (43, 1884183), (47, 1723827), (69, 1174201), (83, 976143), (129, 628061), (141, 574609), (161, 503229), (249, 325381), (301, 269169), (329, 246261), (483, 167743), (581, 139449), (903, 89723), (987, 82087), (989, 81921), (1081, 74949), (1743, 46483), (1909, 42441), (2021, 40089), (2967, 27307), (3243, 24983), (3569, 22701), (3901, 20769), (5727, 14147), (6063, 13363), (6923, 11703), (7567, 10707)]