661862405

素因数分解:

$5^1\times {\mathrm{127}}^1\times {\mathrm{643}}^1\times {\mathrm{1621}}^1$

素因数の和:2396

約数の個数: 16

約数和(自身を含む): 802228224

約数和(自身を除く): 140365819

約数列:

[1, 5, 127, 635, 643, 1621, 3215, 8105, 81661, 205867, 408305, 1029335, 1042303, 5211515, 132372481, 661862405]

約数ペア:

[(1, 661862405), (5, 132372481), (127, 5211515), (635, 1042303), (643, 1029335), (1621, 408305), (3215, 205867), (8105, 81661)]