19959009

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 33555456

約数和(自身を除く): 13596447

約数列:

[1, 3, 7, 21, 23, 31, 43, 69, 93, 129, 161, 217, 301, 483, 651, 713, 903, 961, 989, 1333, 2139, 2883, 2967, 3999, 4991, 6727, 6923, 9331, 14973, 20181, 20769, 22103, 27993, 30659, 41323, 66309, 91977, 123969, 154721, 214613, 289261, 464163, 643839, 867783, 950429, 2851287, 6653003, 19959009]

約数ペア:

[(1, 19959009), (3, 6653003), (7, 2851287), (21, 950429), (23, 867783), (31, 643839), (43, 464163), (69, 289261), (93, 214613), (129, 154721), (161, 123969), (217, 91977), (301, 66309), (483, 41323), (651, 30659), (713, 27993), (903, 22103), (961, 20769), (989, 20181), (1333, 14973), (2139, 9331), (2883, 6923), (2967, 6727), (3999, 4991)]