20998439

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{463}}^1$

素因数の和:531

約数の個数: 32

約数和(自身を含む): 28508160

約数和(自身を除く): 7509721

約数列:

[1, 7, 11, 19, 31, 77, 133, 209, 217, 341, 463, 589, 1463, 2387, 3241, 4123, 5093, 6479, 8797, 14353, 35651, 45353, 61579, 96767, 100471, 157883, 272707, 677369, 1105181, 1908949, 2999777, 20998439]

約数ペア:

[(1, 20998439), (7, 2999777), (11, 1908949), (19, 1105181), (31, 677369), (77, 272707), (133, 157883), (209, 100471), (217, 96767), (341, 61579), (463, 45353), (589, 35651), (1463, 14353), (2387, 8797), (3241, 6479), (4123, 5093)]