21257319

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{1499}}^1$

素因数の和:1694

約数の個数: 16

約数和(自身を含む): 29520000

約数和(自身を除く): 8262681

約数列:

[1, 3, 29, 87, 163, 489, 1499, 4497, 4727, 14181, 43471, 130413, 244337, 733011, 7085773, 21257319]

約数ペア:

[(1, 21257319), (3, 7085773), (29, 733011), (87, 244337), (163, 130413), (489, 43471), (1499, 14181), (4497, 4727)]