21104253

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:290

約数の個数: 32

約数和(自身を含む): 32313600

約数和(自身を除く): 11209347

約数列:

[1, 3, 9, 27, 71, 101, 109, 213, 303, 327, 639, 909, 981, 1917, 2727, 2943, 7171, 7739, 11009, 21513, 23217, 33027, 64539, 69651, 99081, 193617, 208953, 297243, 781639, 2344917, 7034751, 21104253]

約数ペア:

[(1, 21104253), (3, 7034751), (9, 2344917), (27, 781639), (71, 297243), (101, 208953), (109, 193617), (213, 99081), (303, 69651), (327, 64539), (639, 33027), (909, 23217), (981, 21513), (1917, 11009), (2727, 7739), (2943, 7171)]