21000309

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{8963}}^1$

素因数の和:9048

約数の個数: 16

約数和(自身を含む): 30979584

約数和(自身を除く): 9979275

約数列:

[1, 3, 11, 33, 71, 213, 781, 2343, 8963, 26889, 98593, 295779, 636373, 1909119, 7000103, 21000309]

約数ペア:

[(1, 21000309), (3, 7000103), (11, 1909119), (33, 636373), (71, 295779), (213, 98593), (781, 26889), (2343, 8963)]