21112895

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{769}}^1$

素因数の和:827

約数の個数: 24

約数和(自身を含む): 28366800

約数和(自身を除く): 7253905

約数列:

[1, 5, 17, 19, 85, 95, 289, 323, 769, 1445, 1615, 3845, 5491, 13073, 14611, 27455, 65365, 73055, 222241, 248387, 1111205, 1241935, 4222579, 21112895]

約数ペア:

[(1, 21112895), (5, 4222579), (17, 1241935), (19, 1111205), (85, 248387), (95, 222241), (289, 73055), (323, 65365), (769, 27455), (1445, 14611), (1615, 13073), (3845, 5491)]