21095870

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20887}}^1$

素因数の和:20995

約数の個数: 16

約数和(自身を含む): 38350368

約数和(自身を除く): 17254498

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 20887, 41774, 104435, 208870, 2109587, 4219174, 10547935, 21095870]

約数ペア:

[(1, 21095870), (2, 10547935), (5, 4219174), (10, 2109587), (101, 208870), (202, 104435), (505, 41774), (1010, 20887)]