21087451

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{1999}}^1$

素因数の和:2154

約数の個数: 16

約数和(自身を含む): 26496000

約数和(自身を除く): 5408549

約数列:

[1, 7, 11, 77, 137, 959, 1507, 1999, 10549, 13993, 21989, 153923, 273863, 1917041, 3012493, 21087451]

約数ペア:

[(1, 21087451), (7, 3012493), (11, 1917041), (77, 273863), (137, 153923), (959, 21989), (1507, 13993), (1999, 10549)]