19919218

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:322

約数の個数: 32

約数和(自身を含む): 33672960

約数和(自身を除く): 13753742

約数列:

[1, 2, 11, 22, 73, 79, 146, 157, 158, 314, 803, 869, 1606, 1727, 1738, 3454, 5767, 11461, 11534, 12403, 22922, 24806, 63437, 126071, 126874, 136433, 252142, 272866, 905419, 1810838, 9959609, 19919218]

約数ペア:

[(1, 19919218), (2, 9959609), (11, 1810838), (22, 905419), (73, 272866), (79, 252142), (146, 136433), (157, 126874), (158, 126071), (314, 63437), (803, 24806), (869, 22922), (1606, 12403), (1727, 11534), (1738, 11461), (3454, 5767)]