21067615

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{263}}^1\times {\mathrm{433}}^1$

素因数の和:738

約数の個数: 16

約数和(自身を含む): 26123328

約数和(自身を除く): 5055713

約数列:

[1, 5, 37, 185, 263, 433, 1315, 2165, 9731, 16021, 48655, 80105, 113879, 569395, 4213523, 21067615]

約数ペア:

[(1, 21067615), (5, 4213523), (37, 569395), (185, 113879), (263, 80105), (433, 48655), (1315, 16021), (2165, 9731)]