20990321

素因数分解:

${\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:476

約数の個数: 16

約数和(自身を含む): 23654400

約数和(自身を除く): 2664079

約数列:

[1, 11, 43, 199, 223, 473, 2189, 2453, 8557, 9589, 44377, 94127, 105479, 488147, 1908211, 20990321]

約数ペア:

[(1, 20990321), (11, 1908211), (43, 488147), (199, 105479), (223, 94127), (473, 44377), (2189, 9589), (2453, 8557)]