20688437

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{293}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 26544672

約数和(自身を除く): 5856235

約数列:

[1, 7, 11, 49, 77, 131, 293, 539, 917, 1441, 2051, 3223, 6419, 10087, 14357, 22561, 38383, 70609, 157927, 268681, 422213, 1880767, 2955491, 20688437]

約数ペア:

[(1, 20688437), (7, 2955491), (11, 1880767), (49, 422213), (77, 268681), (131, 157927), (293, 70609), (539, 38383), (917, 22561), (1441, 14357), (2051, 10087), (3223, 6419)]