18455213

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{461}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 23173920

約数和(自身を除く): 4718707

約数列:

[1, 7, 19, 43, 49, 133, 301, 461, 817, 931, 2107, 3227, 5719, 8759, 19823, 22589, 40033, 61313, 138761, 376637, 429191, 971327, 2636459, 18455213]

約数ペア:

[(1, 18455213), (7, 2636459), (19, 971327), (43, 429191), (49, 376637), (133, 138761), (301, 61313), (461, 40033), (817, 22589), (931, 19823), (2107, 8759), (3227, 5719)]