21116678

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{1229}}^1$

素因数の和:1324

約数の個数: 24

約数和(自身を含む): 35335440

約数和(自身を除く): 14218762

約数列:

[1, 2, 11, 22, 71, 121, 142, 242, 781, 1229, 1562, 2458, 8591, 13519, 17182, 27038, 87259, 148709, 174518, 297418, 959849, 1919698, 10558339, 21116678]

約数ペア:

[(1, 21116678), (2, 10558339), (11, 1919698), (22, 959849), (71, 297418), (121, 174518), (142, 148709), (242, 87259), (781, 27038), (1229, 17182), (1562, 13519), (2458, 8591)]