20739455

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 7627393

約数列:

[1, 5, 11, 47, 55, 71, 113, 235, 355, 517, 565, 781, 1243, 2585, 3337, 3905, 5311, 6215, 8023, 16685, 26555, 36707, 40115, 58421, 88253, 183535, 292105, 377081, 441265, 1885405, 4147891, 20739455]

約数ペア:

[(1, 20739455), (5, 4147891), (11, 1885405), (47, 441265), (55, 377081), (71, 292105), (113, 183535), (235, 88253), (355, 58421), (517, 40115), (565, 36707), (781, 26555), (1243, 16685), (2585, 8023), (3337, 6215), (3905, 5311)]