21505016

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206779}}^1$

素因数の和:206798

約数の個数: 16

約数和(自身を含む): 43423800

約数和(自身を除く): 21918784

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206779, 413558, 827116, 1654232, 2688127, 5376254, 10752508, 21505016]

約数ペア:

[(1, 21505016), (2, 10752508), (4, 5376254), (8, 2688127), (13, 1654232), (26, 827116), (52, 413558), (104, 206779)]