21357916

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{443}}^1\times {\mathrm{709}}^1$

素因数の和:1173

約数の個数: 24

約数和(自身を含む): 39720240

約数和(自身を除く): 18362324

約数列:

[1, 2, 4, 17, 34, 68, 443, 709, 886, 1418, 1772, 2836, 7531, 12053, 15062, 24106, 30124, 48212, 314087, 628174, 1256348, 5339479, 10678958, 21357916]

約数ペア:

[(1, 21357916), (2, 10678958), (4, 5339479), (17, 1256348), (34, 628174), (68, 314087), (443, 48212), (709, 30124), (886, 24106), (1418, 15062), (1772, 12053), (2836, 7531)]