20639487

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:491

約数の個数: 32

約数和(自身を含む): 31850496

約数和(自身を除く): 11211009

約数列:

[1, 3, 11, 23, 33, 69, 71, 213, 253, 383, 759, 781, 1149, 1633, 2343, 4213, 4899, 8809, 12639, 17963, 26427, 27193, 53889, 81579, 96899, 290697, 299123, 625439, 897369, 1876317, 6879829, 20639487]

約数ペア:

[(1, 20639487), (3, 6879829), (11, 1876317), (23, 897369), (33, 625439), (69, 299123), (71, 290697), (213, 96899), (253, 81579), (383, 53889), (759, 27193), (781, 26427), (1149, 17963), (1633, 12639), (2343, 8809), (4213, 4899)]