639646

素因数分解:

$2^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:184

約数の個数: 24

約数和(自身を含む): 1145016

約数和(自身を除く): 505370

約数列:

[1, 2, 7, 14, 49, 61, 98, 107, 122, 214, 427, 749, 854, 1498, 2989, 5243, 5978, 6527, 10486, 13054, 45689, 91378, 319823, 639646]

約数ペア:

[(1, 639646), (2, 319823), (7, 91378), (14, 45689), (49, 13054), (61, 10486), (98, 6527), (107, 5978), (122, 5243), (214, 2989), (427, 1498), (749, 854)]