21746945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{5569}}^1$

素因数の和:5656

約数の個数: 16

約数和(自身を含む): 28874880

約数和(自身を除く): 7127935

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 5569, 27845, 61259, 306295, 395399, 1976995, 4349389, 21746945]

約数ペア:

[(1, 21746945), (5, 4349389), (11, 1976995), (55, 395399), (71, 306295), (355, 61259), (781, 27845), (3905, 5569)]