19872545

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{727}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 10319071

約数列:

[1, 5, 7, 11, 35, 55, 71, 77, 355, 385, 497, 727, 781, 2485, 3635, 3905, 5089, 5467, 7997, 25445, 27335, 39985, 51617, 55979, 258085, 279895, 361319, 567787, 1806595, 2838935, 3974509, 19872545]

約数ペア:

[(1, 19872545), (5, 3974509), (7, 2838935), (11, 1806595), (35, 567787), (55, 361319), (71, 279895), (77, 258085), (355, 55979), (385, 51617), (497, 39985), (727, 27335), (781, 25445), (2485, 7997), (3635, 5467), (3905, 5089)]