21105539

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{3931}}^1$

素因数の和:4010

約数の個数: 16

約数和(自身を含む): 26423040

約数和(自身を除く): 5317501

約数列:

[1, 7, 13, 59, 91, 413, 767, 3931, 5369, 27517, 51103, 231929, 357721, 1623503, 3015077, 21105539]

約数ペア:

[(1, 21105539), (7, 3015077), (13, 1623503), (59, 357721), (91, 231929), (413, 51103), (767, 27517), (3931, 5369)]