20922209

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6449311

約数列:

[1, 7, 11, 43, 71, 77, 89, 301, 473, 497, 623, 781, 979, 3053, 3311, 3827, 5467, 6319, 6853, 21371, 26789, 33583, 42097, 44233, 69509, 235081, 271717, 294679, 486563, 1902019, 2988887, 20922209]

約数ペア:

[(1, 20922209), (7, 2988887), (11, 1902019), (43, 486563), (71, 294679), (77, 271717), (89, 235081), (301, 69509), (473, 44233), (497, 42097), (623, 33583), (781, 26789), (979, 21371), (3053, 6853), (3311, 6319), (3827, 5467)]