21139316

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{11173}}^1$

素因数の和:11231

約数の個数: 24

約数和(自身を含む): 41299104

約数和(自身を除く): 20159788

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 1892, 11173, 22346, 44692, 122903, 245806, 480439, 491612, 960878, 1921756, 5284829, 10569658, 21139316]

約数ペア:

[(1, 21139316), (2, 10569658), (4, 5284829), (11, 1921756), (22, 960878), (43, 491612), (44, 480439), (86, 245806), (172, 122903), (473, 44692), (946, 22346), (1892, 11173)]