20991068

素因数分解:

$2^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{5903}}^1$

素因数の和:6041

約数の個数: 24

約数和(自身を含む): 42319872

約数和(自身を除く): 21328804

約数列:

[1, 2, 4, 7, 14, 28, 127, 254, 508, 889, 1778, 3556, 5903, 11806, 23612, 41321, 82642, 165284, 749681, 1499362, 2998724, 5247767, 10495534, 20991068]

約数ペア:

[(1, 20991068), (2, 10495534), (4, 5247767), (7, 2998724), (14, 1499362), (28, 749681), (127, 165284), (254, 82642), (508, 41321), (889, 23612), (1778, 11806), (3556, 5903)]