21120514

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{5503}}^1$

素因数の和:5625

約数の個数: 16

約数和(自身を含む): 33684480

約数和(自身を除く): 12563966

約数列:

[1, 2, 19, 38, 101, 202, 1919, 3838, 5503, 11006, 104557, 209114, 555803, 1111606, 10560257, 21120514]

約数ペア:

[(1, 21120514), (2, 10560257), (19, 1111606), (38, 555803), (101, 209114), (202, 104557), (1919, 11006), (3838, 5503)]