28406721

素因数分解:

$3^1\times 7^2\times {\mathrm{193243}}^1$

素因数の和:193260

約数の個数: 12

約数和(自身を含む): 44059632

約数和(自身を除く): 15652911

約数列:

[1, 3, 7, 21, 49, 147, 193243, 579729, 1352701, 4058103, 9468907, 28406721]

約数ペア:

[(1, 28406721), (3, 9468907), (7, 4058103), (21, 1352701), (49, 579729), (147, 193243)]