21255729

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37889}}^1$

素因数の和:37920

約数の個数: 16

約数和(自身を含む): 32736960

約数和(自身を除く): 11481231

約数列:

[1, 3, 11, 17, 33, 51, 187, 561, 37889, 113667, 416779, 644113, 1250337, 1932339, 7085243, 21255729]

約数ペア:

[(1, 21255729), (3, 7085243), (11, 1932339), (17, 1250337), (33, 644113), (51, 416779), (187, 113667), (561, 37889)]