28920255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{21187}}^1$

素因数の和:21215

約数の個数: 32

約数和(自身を含む): 56953344

約数和(自身を除く): 28033089

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 21187, 63561, 105935, 148309, 275431, 317805, 444927, 741545, 826293, 1377155, 1928017, 2224635, 4131465, 5784051, 9640085, 28920255]

約数ペア:

[(1, 28920255), (3, 9640085), (5, 5784051), (7, 4131465), (13, 2224635), (15, 1928017), (21, 1377155), (35, 826293), (39, 741545), (65, 444927), (91, 317805), (105, 275431), (195, 148309), (273, 105935), (455, 63561), (1365, 21187)]