21253353

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 32182272

約数和(自身を除く): 10928919

約数列:

[1, 3, 11, 33, 47, 71, 141, 193, 213, 517, 579, 781, 1551, 2123, 2343, 3337, 6369, 9071, 10011, 13703, 27213, 36707, 41109, 99781, 110121, 150733, 299343, 452199, 644041, 1932123, 7084451, 21253353]

約数ペア:

[(1, 21253353), (3, 7084451), (11, 1932123), (33, 644041), (47, 452199), (71, 299343), (141, 150733), (193, 110121), (213, 99781), (517, 41109), (579, 36707), (781, 27213), (1551, 13703), (2123, 10011), (2343, 9071), (3337, 6369)]