21705805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{6689}}^1$

素因数の和:6764

約数の個数: 16

約数和(自身を含む): 28900800

約数和(自身を除く): 7194995

約数列:

[1, 5, 11, 55, 59, 295, 649, 3245, 6689, 33445, 73579, 367895, 394651, 1973255, 4341161, 21705805]

約数ペア:

[(1, 21705805), (5, 4341161), (11, 1973255), (55, 394651), (59, 367895), (295, 73579), (649, 33445), (3245, 6689)]