21371903

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 27287040

約数和(自身を除く): 5915137

約数列:

[1, 7, 19, 37, 43, 101, 133, 259, 301, 703, 707, 817, 1591, 1919, 3737, 4343, 4921, 5719, 11137, 13433, 26159, 30229, 30401, 71003, 82517, 160691, 211603, 497021, 577619, 1124837, 3053129, 21371903]

約数ペア:

[(1, 21371903), (7, 3053129), (19, 1124837), (37, 577619), (43, 497021), (101, 211603), (133, 160691), (259, 82517), (301, 71003), (703, 30401), (707, 30229), (817, 26159), (1591, 13433), (1919, 11137), (3737, 5719), (4343, 4921)]