28806380

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{2179}}^1$

素因数の和:2849

約数の個数: 24

約数和(自身を含む): 60612720

約数和(自身を除く): 31806340

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2179, 2644, 3305, 4358, 6610, 8716, 10895, 13220, 21790, 43580, 1440319, 2880638, 5761276, 7201595, 14403190, 28806380]

約数ペア:

[(1, 28806380), (2, 14403190), (4, 7201595), (5, 5761276), (10, 2880638), (20, 1440319), (661, 43580), (1322, 21790), (2179, 13220), (2644, 10895), (3305, 8716), (4358, 6610)]