21047272

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{257}}^1\times {\mathrm{353}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 41099400

約数和(自身を除く): 20052128

約数列:

[1, 2, 4, 8, 29, 58, 116, 232, 257, 353, 514, 706, 1028, 1412, 2056, 2824, 7453, 10237, 14906, 20474, 29812, 40948, 59624, 81896, 90721, 181442, 362884, 725768, 2630909, 5261818, 10523636, 21047272]

約数ペア:

[(1, 21047272), (2, 10523636), (4, 5261818), (8, 2630909), (29, 725768), (58, 362884), (116, 181442), (232, 90721), (257, 81896), (353, 59624), (514, 40948), (706, 29812), (1028, 20474), (1412, 14906), (2056, 10237), (2824, 7453)]