21056329

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:325

約数の個数: 24

約数和(自身を含む): 25740288

約数和(自身を除く): 4683959

約数列:

[1, 7, 41, 47, 49, 223, 287, 329, 1561, 1927, 2009, 2303, 9143, 10481, 10927, 13489, 64001, 73367, 94423, 429721, 448007, 513569, 3008047, 21056329]

約数ペア:

[(1, 21056329), (7, 3008047), (41, 513569), (47, 448007), (49, 429721), (223, 94423), (287, 73367), (329, 64001), (1561, 13489), (1927, 10927), (2009, 10481), (2303, 9143)]