28991739

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{72661}}^1$

素因数の和:72690

約数の個数: 16

約数和(自身を含む): 46503680

約数和(自身を除く): 17511941

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 72661, 217983, 508627, 1380559, 1525881, 4141677, 9663913, 28991739]

約数ペア:

[(1, 28991739), (3, 9663913), (7, 4141677), (19, 1525881), (21, 1380559), (57, 508627), (133, 217983), (399, 72661)]