21128828

素因数分解:

$2^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{10337}}^1$

素因数の和:10421

約数の個数: 24

約数和(自身を含む): 42840672

約数和(自身を除く): 21711844

約数列:

[1, 2, 4, 7, 14, 28, 73, 146, 292, 511, 1022, 2044, 10337, 20674, 41348, 72359, 144718, 289436, 754601, 1509202, 3018404, 5282207, 10564414, 21128828]

約数ペア:

[(1, 21128828), (2, 10564414), (4, 5282207), (7, 3018404), (14, 1509202), (28, 754601), (73, 289436), (146, 144718), (292, 72359), (511, 41348), (1022, 20674), (2044, 10337)]