21041531

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{233}}^1$

素因数の和:363

約数の個数: 24

約数和(自身を含む): 26142480

約数和(自身を除く): 5100949

約数列:

[1, 7, 19, 49, 97, 133, 233, 679, 931, 1631, 1843, 4427, 4753, 11417, 12901, 22601, 30989, 90307, 158207, 216923, 429419, 1107449, 3005933, 21041531]

約数ペア:

[(1, 21041531), (7, 3005933), (19, 1107449), (49, 429419), (97, 216923), (133, 158207), (233, 90307), (679, 30989), (931, 22601), (1631, 12901), (1843, 11417), (4427, 4753)]