21789368

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{66431}}^1$

素因数の和:66478

約数の個数: 16

約数和(自身を含む): 41852160

約数和(自身を除く): 20062792

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 66431, 132862, 265724, 531448, 2723671, 5447342, 10894684, 21789368]

約数ペア:

[(1, 21789368), (2, 10894684), (4, 5447342), (8, 2723671), (41, 531448), (82, 265724), (164, 132862), (328, 66431)]