665968

素因数分解:

$2^4\times {\mathrm{107}}^1\times {\mathrm{389}}^1$

素因数の和:504

約数の個数: 20

約数和(自身を含む): 1305720

約数和(自身を除く): 639752

約数列:

[1, 2, 4, 8, 16, 107, 214, 389, 428, 778, 856, 1556, 1712, 3112, 6224, 41623, 83246, 166492, 332984, 665968]

約数ペア:

[(1, 665968), (2, 332984), (4, 166492), (8, 83246), (16, 41623), (107, 6224), (214, 3112), (389, 1712), (428, 1556), (778, 856)]