261291247

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1\times {\mathrm{293}}^1$

素因数の和:543

約数の個数: 32

約数和(自身を含む): 325140480

約数和(自身を除く): 63849233

約数列:

[1, 7, 23, 29, 161, 191, 203, 293, 667, 1337, 2051, 4393, 4669, 5539, 6739, 8497, 30751, 38773, 47173, 55963, 59479, 127397, 195431, 391741, 891779, 1287149, 1368017, 1622927, 9010043, 11360489, 37327321, 261291247]

約数ペア:

[(1, 261291247), (7, 37327321), (23, 11360489), (29, 9010043), (161, 1622927), (191, 1368017), (203, 1287149), (293, 891779), (667, 391741), (1337, 195431), (2051, 127397), (4393, 59479), (4669, 55963), (5539, 47173), (6739, 38773), (8497, 30751)]