128878869

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{20389}}^1$

素因数の和:20449

約数の個数: 24

約数和(自身を含む): 204552480

約数和(自身を除く): 75673611

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 6321, 20389, 61167, 142723, 428169, 876727, 999061, 2630181, 2997183, 6137089, 18411267, 42959623, 128878869]

約数ペア:

[(1, 128878869), (3, 42959623), (7, 18411267), (21, 6137089), (43, 2997183), (49, 2630181), (129, 999061), (147, 876727), (301, 428169), (903, 142723), (2107, 61167), (6321, 20389)]