208921721

素因数分解:

${\mathrm{17}}^1\times {\mathrm{37}}^2\times {\mathrm{47}}^1\times {\mathrm{191}}^1$

素因数の和:329

約数の個数: 24

約数和(自身を含む): 233404416

約数和(自身を除く): 24482695

約数列:

[1, 17, 37, 47, 191, 629, 799, 1369, 1739, 3247, 7067, 8977, 23273, 29563, 64343, 120139, 152609, 261479, 332149, 1093831, 4445143, 5646533, 12289513, 208921721]

約数ペア:

[(1, 208921721), (17, 12289513), (37, 5646533), (47, 4445143), (191, 1093831), (629, 332149), (799, 261479), (1369, 152609), (1739, 120139), (3247, 64343), (7067, 29563), (8977, 23273)]