21359157

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:313

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10574283

約数列:

[1, 3, 17, 23, 51, 69, 131, 139, 391, 393, 417, 1173, 2227, 2363, 3013, 3197, 6681, 7089, 9039, 9591, 18209, 51221, 54349, 54627, 153663, 163047, 309553, 418807, 928659, 1256421, 7119719, 21359157]

約数ペア:

[(1, 21359157), (3, 7119719), (17, 1256421), (23, 928659), (51, 418807), (69, 309553), (131, 163047), (139, 153663), (391, 54627), (393, 54349), (417, 51221), (1173, 18209), (2227, 9591), (2363, 9039), (3013, 7089), (3197, 6681)]