28680025

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:550

約数の個数: 36

約数和(自身を含む): 41230000

約数和(自身を除く): 12549975

約数列:

[1, 5, 11, 19, 25, 55, 95, 121, 209, 275, 475, 499, 605, 1045, 2299, 2495, 3025, 5225, 5489, 9481, 11495, 12475, 27445, 47405, 57475, 60379, 104291, 137225, 237025, 301895, 521455, 1147201, 1509475, 2607275, 5736005, 28680025]

約数ペア:

[(1, 28680025), (5, 5736005), (11, 2607275), (19, 1509475), (25, 1147201), (55, 521455), (95, 301895), (121, 237025), (209, 137225), (275, 104291), (475, 60379), (499, 57475), (605, 47405), (1045, 27445), (2299, 12475), (2495, 11495), (3025, 9481), (5225, 5489)]