28720825

素因数分解:

$5^2\times 7^1\times {\mathrm{337}}^1\times {\mathrm{487}}^1$

素因数の和:841

約数の個数: 24

約数和(自身を含む): 40906112

約数和(自身を除く): 12185287

約数列:

[1, 5, 7, 25, 35, 175, 337, 487, 1685, 2359, 2435, 3409, 8425, 11795, 12175, 17045, 58975, 85225, 164119, 820595, 1148833, 4102975, 5744165, 28720825]

約数ペア:

[(1, 28720825), (5, 5744165), (7, 4102975), (25, 1148833), (35, 820595), (175, 164119), (337, 85225), (487, 58975), (1685, 17045), (2359, 12175), (2435, 11795), (3409, 8425)]