21747121

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1999}}^1$

素因数の和:2076

約数の個数: 16

約数和(自身を含む): 25344000

約数和(自身を除く): 3596879

約数列:

[1, 11, 23, 43, 253, 473, 989, 1999, 10879, 21989, 45977, 85957, 505747, 945527, 1977011, 21747121]

約数ペア:

[(1, 21747121), (11, 1977011), (23, 945527), (43, 505747), (253, 85957), (473, 45977), (989, 21989), (1999, 10879)]