21571781

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{6833}}^1$

素因数の和:6892

約数の個数: 16

約数和(自身を含む): 27554688

約数和(自身を除く): 5982907

約数列:

[1, 7, 11, 41, 77, 287, 451, 3157, 6833, 47831, 75163, 280153, 526141, 1961071, 3081683, 21571781]

約数ペア:

[(1, 21571781), (7, 3081683), (11, 1961071), (41, 526141), (77, 280153), (287, 75163), (451, 47831), (3157, 6833)]