20998108

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{691}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 37666944

約数和(自身を除く): 16668836

約数列:

[1, 2, 4, 71, 107, 142, 214, 284, 428, 691, 1382, 2764, 7597, 15194, 30388, 49061, 73937, 98122, 147874, 196244, 295748, 5249527, 10499054, 20998108]

約数ペア:

[(1, 20998108), (2, 10499054), (4, 5249527), (71, 295748), (107, 196244), (142, 147874), (214, 98122), (284, 73937), (428, 49061), (691, 30388), (1382, 15194), (2764, 7597)]