21004543

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1\times {\mathrm{461}}^1$

素因数の和:774

約数の個数: 16

約数和(自身を含む): 25191936

約数和(自身を除く): 4187393

約数列:

[1, 7, 23, 161, 283, 461, 1981, 3227, 6509, 10603, 45563, 74221, 130463, 913241, 3000649, 21004543]

約数ペア:

[(1, 21004543), (7, 3000649), (23, 913241), (161, 130463), (283, 74221), (461, 45563), (1981, 10603), (3227, 6509)]