21706984

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208721}}^1$

素因数の和:208740

約数の個数: 16

約数和(自身を含む): 43831620

約数和(自身を除く): 22124636

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208721, 417442, 834884, 1669768, 2713373, 5426746, 10853492, 21706984]

約数ペア:

[(1, 21706984), (2, 10853492), (4, 5426746), (8, 2713373), (13, 1669768), (26, 834884), (52, 417442), (104, 208721)]