20340145

素因数分解:

$5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1361}}^1$

素因数の和:1441

約数の個数: 24

約数和(自身を含む): 28879848

約数和(自身を除く): 8539703

約数列:

[1, 5, 7, 35, 49, 61, 245, 305, 427, 1361, 2135, 2989, 6805, 9527, 14945, 47635, 66689, 83021, 333445, 415105, 581147, 2905735, 4068029, 20340145]

約数ペア:

[(1, 20340145), (5, 4068029), (7, 2905735), (35, 581147), (49, 415105), (61, 333445), (245, 83021), (305, 66689), (427, 47635), (1361, 14945), (2135, 9527), (2989, 6805)]