20990511

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{307}}^1$

素因数の和:491

約数の個数: 24

約数和(自身を含む): 31135104

約数和(自身を除く): 10144593

約数列:

[1, 3, 9, 71, 107, 213, 307, 321, 639, 921, 963, 2763, 7597, 21797, 22791, 32849, 65391, 68373, 98547, 196173, 295641, 2332279, 6996837, 20990511]

約数ペア:

[(1, 20990511), (3, 6996837), (9, 2332279), (71, 295641), (107, 196173), (213, 98547), (307, 68373), (321, 65391), (639, 32849), (921, 22791), (963, 21797), (2763, 7597)]