209904305

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{349}}^1\times {\mathrm{487}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 286944000

約数和(自身を除く): 77039695

約数列:

[1, 5, 13, 19, 65, 95, 247, 349, 487, 1235, 1745, 2435, 4537, 6331, 6631, 9253, 22685, 31655, 33155, 46265, 86203, 120289, 169963, 431015, 601445, 849815, 2209519, 3229297, 11047595, 16146485, 41980861, 209904305]

約数ペア:

[(1, 209904305), (5, 41980861), (13, 16146485), (19, 11047595), (65, 3229297), (95, 2209519), (247, 849815), (349, 601445), (487, 431015), (1235, 169963), (1745, 120289), (2435, 86203), (4537, 46265), (6331, 33155), (6631, 31655), (9253, 22685)]