21037880

素因数分解:

$2^3\times 5^1\times {\mathrm{525947}}^1$

素因数の和:525958

約数の個数: 16

約数和(自身を含む): 47335320

約数和(自身を除く): 26297440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525947, 1051894, 2103788, 2629735, 4207576, 5259470, 10518940, 21037880]

約数ペア:

[(1, 21037880), (2, 10518940), (4, 5259470), (5, 4207576), (8, 2629735), (10, 2103788), (20, 1051894), (40, 525947)]