21090511

素因数分解:

${\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1301}}^1$

素因数の和:1386

約数の個数: 16

約数和(自身を含む): 24060960

約数和(自身を除く): 2970449

約数列:

[1, 13, 29, 43, 377, 559, 1247, 1301, 16211, 16913, 37729, 55943, 490477, 727259, 1622347, 21090511]

約数ペア:

[(1, 21090511), (13, 1622347), (29, 727259), (43, 490477), (377, 55943), (559, 37729), (1247, 16913), (1301, 16211)]