19999504

素因数分解:

$2^4\times 7^1\times {\mathrm{178567}}^1$

素因数の和:178582

約数の個数: 20

約数和(自身を含む): 44284864

約数和(自身を除く): 24285360

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 178567, 357134, 714268, 1249969, 1428536, 2499938, 2857072, 4999876, 9999752, 19999504]

約数ペア:

[(1, 19999504), (2, 9999752), (4, 4999876), (7, 2857072), (8, 2499938), (14, 1428536), (16, 1249969), (28, 714268), (56, 357134), (112, 178567)]