21438263

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{433}}^1\times {\mathrm{643}}^1$

素因数の和:1094

約数の個数: 16

約数和(自身を含む): 26831616

約数和(自身を除く): 5393353

約数列:

[1, 7, 11, 77, 433, 643, 3031, 4501, 4763, 7073, 33341, 49511, 278419, 1948933, 3062609, 21438263]

約数ペア:

[(1, 21438263), (7, 3062609), (11, 1948933), (77, 278419), (433, 49511), (643, 33341), (3031, 7073), (4501, 4763)]