21288001

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:325

約数の個数: 24

約数和(自身を含む): 26101440

約数和(自身を除く): 4813439

約数列:

[1, 7, 29, 49, 71, 203, 211, 497, 1421, 1477, 2059, 3479, 6119, 10339, 14413, 14981, 42833, 100891, 104867, 299831, 434449, 734069, 3041143, 21288001]

約数ペア:

[(1, 21288001), (7, 3041143), (29, 734069), (49, 434449), (71, 299831), (203, 104867), (211, 100891), (497, 42833), (1421, 14981), (1477, 14413), (2059, 10339), (3479, 6119)]