21275155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20359}}^1$

素因数の和:20394

約数の個数: 16

約数和(自身を含む): 29318400

約数和(自身を除く): 8043245

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20359, 101795, 223949, 386821, 1119745, 1934105, 4255031, 21275155]

約数ペア:

[(1, 21275155), (5, 4255031), (11, 1934105), (19, 1119745), (55, 386821), (95, 223949), (209, 101795), (1045, 20359)]