81820821

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{449}}^1$

素因数の和:633

約数の個数: 32

約数和(自身を含む): 120960000

約数和(自身を除く): 39139179

約数列:

[1, 3, 19, 23, 57, 69, 139, 417, 437, 449, 1311, 1347, 2641, 3197, 7923, 8531, 9591, 10327, 25593, 30981, 60743, 62411, 182229, 187233, 196213, 588639, 1185809, 1435453, 3557427, 4306359, 27273607, 81820821]

約数ペア:

[(1, 81820821), (3, 27273607), (19, 4306359), (23, 3557427), (57, 1435453), (69, 1185809), (139, 588639), (417, 196213), (437, 187233), (449, 182229), (1311, 62411), (1347, 60743), (2641, 30981), (3197, 25593), (7923, 10327), (8531, 9591)]