21191303

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{3061}}^1$

素因数の和:3134

約数の個数: 16

約数和(自身を含む): 25867776

約数和(自身を除く): 4676473

約数列:

[1, 7, 23, 43, 161, 301, 989, 3061, 6923, 21427, 70403, 131623, 492821, 921361, 3027329, 21191303]

約数ペア:

[(1, 21191303), (7, 3027329), (23, 921361), (43, 492821), (161, 131623), (301, 70403), (989, 21427), (3061, 6923)]