20840638

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2663}}^1$

素因数の和:2728

約数の個数: 32

約数和(自身を含む): 39384576

約数和(自身を除く): 18543938

約数列:

[1, 2, 7, 13, 14, 26, 43, 86, 91, 182, 301, 559, 602, 1118, 2663, 3913, 5326, 7826, 18641, 34619, 37282, 69238, 114509, 229018, 242333, 484666, 801563, 1488617, 1603126, 2977234, 10420319, 20840638]

約数ペア:

[(1, 20840638), (2, 10420319), (7, 2977234), (13, 1603126), (14, 1488617), (26, 801563), (43, 484666), (86, 242333), (91, 229018), (182, 114509), (301, 69238), (559, 37282), (602, 34619), (1118, 18641), (2663, 7826), (3913, 5326)]