21906339

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2767}}^1$

素因数の和:2819

約数の個数: 32

約数和(自身を含む): 37201920

約数和(自身を除く): 15295581

約数列:

[1, 3, 7, 13, 21, 29, 39, 87, 91, 203, 273, 377, 609, 1131, 2639, 2767, 7917, 8301, 19369, 35971, 58107, 80243, 107913, 240729, 251797, 561701, 755391, 1043159, 1685103, 3129477, 7302113, 21906339]

約数ペア:

[(1, 21906339), (3, 7302113), (7, 3129477), (13, 1685103), (21, 1043159), (29, 755391), (39, 561701), (87, 251797), (91, 240729), (203, 107913), (273, 80243), (377, 58107), (609, 35971), (1131, 19369), (2639, 8301), (2767, 7917)]