261640405

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{30727}}^1$

素因数の和:30876

約数の個数: 16

約数和(自身を含む): 340712064

約数和(自身を除く): 79071659

約数列:

[1, 5, 13, 65, 131, 655, 1703, 8515, 30727, 153635, 399451, 1997255, 4025237, 20126185, 52328081, 261640405]

約数ペア:

[(1, 261640405), (5, 52328081), (13, 20126185), (65, 4025237), (131, 1997255), (655, 399451), (1703, 153635), (8515, 30727)]