20809953

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2357}}^1$

素因数の和:2478

約数の個数: 20

約数和(自身を含む): 31384980

約数和(自身を除く): 10575027

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2357, 2943, 7071, 8829, 21213, 63639, 190917, 256913, 770739, 2312217, 6936651, 20809953]

約数ペア:

[(1, 20809953), (3, 6936651), (9, 2312217), (27, 770739), (81, 256913), (109, 190917), (327, 63639), (981, 21213), (2357, 8829), (2943, 7071)]