21805343

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:267

約数の個数: 24

約数和(自身を含む): 26484480

約数和(自身を除く): 4679137

約数列:

[1, 7, 43, 49, 79, 131, 301, 553, 917, 2107, 3397, 3871, 5633, 6419, 10349, 23779, 39431, 72443, 166453, 276017, 445007, 507101, 3115049, 21805343]

約数ペア:

[(1, 21805343), (7, 3115049), (43, 507101), (49, 445007), (79, 276017), (131, 166453), (301, 72443), (553, 39431), (917, 23779), (2107, 10349), (3397, 6419), (3871, 5633)]