640915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:330

約数の個数: 16

約数和(自身を含む): 861696

約数和(自身を除く): 220781

約数列:

[1, 5, 11, 43, 55, 215, 271, 473, 1355, 2365, 2981, 11653, 14905, 58265, 128183, 640915]

約数ペア:

[(1, 640915), (5, 128183), (11, 58265), (43, 14905), (55, 11653), (215, 2981), (271, 2365), (473, 1355)]