21809378

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{4129}}^1$

素因数の和:4289

約数の個数: 16

約数和(自身を含む): 34692000

約数和(自身を除く): 12882622

約数列:

[1, 2, 19, 38, 139, 278, 2641, 4129, 5282, 8258, 78451, 156902, 573931, 1147862, 10904689, 21809378]

約数ペア:

[(1, 21809378), (2, 10904689), (19, 1147862), (38, 573931), (139, 156902), (278, 78451), (2641, 8258), (4129, 5282)]