21979804

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71363}}^1$

素因数の和:71385

約数の個数: 24

約数和(自身を含む): 47956608

約数和(自身を除く): 25976804

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 71363, 142726, 285452, 499541, 784993, 999082, 1569986, 1998164, 3139972, 5494951, 10989902, 21979804]

約数ペア:

[(1, 21979804), (2, 10989902), (4, 5494951), (7, 3139972), (11, 1998164), (14, 1569986), (22, 999082), (28, 784993), (44, 499541), (77, 285452), (154, 142726), (308, 71363)]