21051812

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{199}}^1\times {\mathrm{499}}^1$

素因数の和:755

約数の個数: 24

約数和(自身を含む): 37800000

約数和(自身を除く): 16748188

約数列:

[1, 2, 4, 53, 106, 199, 212, 398, 499, 796, 998, 1996, 10547, 21094, 26447, 42188, 52894, 99301, 105788, 198602, 397204, 5262953, 10525906, 21051812]

約数ペア:

[(1, 21051812), (2, 10525906), (4, 5262953), (53, 397204), (106, 198602), (199, 105788), (212, 99301), (398, 52894), (499, 42188), (796, 26447), (998, 21094), (1996, 10547)]