128779721

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{3167}}^1$

素因数の和:3368

約数の個数: 16

約数和(自身を含む): 152165376

約数和(自身を除く): 23385655

約数列:

[1, 7, 37, 157, 259, 1099, 3167, 5809, 22169, 40663, 117179, 497219, 820253, 3480533, 18397103, 128779721]

約数ペア:

[(1, 128779721), (7, 18397103), (37, 3480533), (157, 820253), (259, 497219), (1099, 117179), (3167, 40663), (5809, 22169)]