21265349

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^2\times {\mathrm{53}}^1$

素因数の和:177

約数の個数: 24

約数和(自身を含む): 26168832

約数和(自身を除く): 4903483

約数列:

[1, 7, 31, 43, 53, 217, 301, 371, 1333, 1643, 1849, 2279, 9331, 11501, 12943, 15953, 57319, 70649, 97997, 401233, 494543, 685979, 3037907, 21265349]

約数ペア:

[(1, 21265349), (7, 3037907), (31, 685979), (43, 494543), (53, 401233), (217, 97997), (301, 70649), (371, 57319), (1333, 15953), (1643, 12943), (1849, 11501), (2279, 9331)]