21977395

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{21031}}^1$

素因数の和:21066

約数の個数: 16

約数和(自身を含む): 30286080

約数和(自身を除く): 8308685

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 21031, 105155, 231341, 399589, 1156705, 1997945, 4395479, 21977395]

約数ペア:

[(1, 21977395), (5, 4395479), (11, 1997945), (19, 1156705), (55, 399589), (95, 231341), (209, 105155), (1045, 21031)]