20829985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 29675520

約数和(自身を除く): 8845535

約数列:

[1, 5, 11, 19, 31, 55, 95, 155, 209, 341, 589, 643, 1045, 1705, 2945, 3215, 6479, 7073, 12217, 19933, 32395, 35365, 61085, 99665, 134387, 219263, 378727, 671935, 1096315, 1893635, 4165997, 20829985]

約数ペア:

[(1, 20829985), (5, 4165997), (11, 1893635), (19, 1096315), (31, 671935), (55, 378727), (95, 219263), (155, 134387), (209, 99665), (341, 61085), (589, 35365), (643, 32395), (1045, 19933), (1705, 12217), (2945, 7073), (3215, 6479)]