20385309

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2689}}^1$

素因数の和:2737

約数の個数: 24

約数和(自身を含む): 32796480

約数和(自身を除く): 12411171

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2689, 7581, 8067, 18823, 51091, 56469, 153273, 357637, 970729, 1072911, 2912187, 6795103, 20385309]

約数ペア:

[(1, 20385309), (3, 6795103), (7, 2912187), (19, 1072911), (21, 970729), (57, 357637), (133, 153273), (361, 56469), (399, 51091), (1083, 18823), (2527, 8067), (2689, 7581)]