21058955

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{433}}^1$

素因数の和:646

約数の個数: 16

約数和(自身を含む): 25873344

約数和(自身を除く): 4814389

約数列:

[1, 5, 71, 137, 355, 433, 685, 2165, 9727, 30743, 48635, 59321, 153715, 296605, 4211791, 21058955]

約数ペア:

[(1, 21058955), (5, 4211791), (71, 296605), (137, 153715), (355, 59321), (433, 48635), (685, 30743), (2165, 9727)]