21218989

素因数分解:

${\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{269}}^1$

素因数の和:452

約数の個数: 16

約数和(自身を含む): 23794560

約数和(自身を除く): 2575571

約数列:

[1, 11, 71, 101, 269, 781, 1111, 2959, 7171, 19099, 27169, 78881, 210089, 298859, 1928999, 21218989]

約数ペア:

[(1, 21218989), (11, 1928999), (71, 298859), (101, 210089), (269, 78881), (781, 27169), (1111, 19099), (2959, 7171)]