20921705

素因数分解:

$5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{2833}}^1$

素因数の和:3056

約数の個数: 16

約数和(自身を含む): 28838784

約数和(自身を除く): 7917079

約数列:

[1, 5, 7, 35, 211, 1055, 1477, 2833, 7385, 14165, 19831, 99155, 597763, 2988815, 4184341, 20921705]

約数ペア:

[(1, 20921705), (5, 4184341), (7, 2988815), (35, 597763), (211, 99155), (1055, 19831), (1477, 14165), (2833, 7385)]