20871807

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{13457}}^1$

素因数の和:13518

約数の個数: 16

約数和(自身を含む): 31007232

約数和(自身を除く): 10135425

約数列:

[1, 3, 11, 33, 47, 141, 517, 1551, 13457, 40371, 148027, 444081, 632479, 1897437, 6957269, 20871807]

約数ペア:

[(1, 20871807), (3, 6957269), (11, 1897437), (33, 632479), (47, 444081), (141, 148027), (517, 40371), (1551, 13457)]