18947924

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{643}}^1$

素因数の和:839

約数の個数: 24

約数和(自身を含む): 34080480

約数和(自身を除く): 15132556

約数列:

[1, 2, 4, 53, 106, 139, 212, 278, 556, 643, 1286, 2572, 7367, 14734, 29468, 34079, 68158, 89377, 136316, 178754, 357508, 4736981, 9473962, 18947924]

約数ペア:

[(1, 18947924), (2, 9473962), (4, 4736981), (53, 357508), (106, 178754), (139, 136316), (212, 89377), (278, 68158), (556, 34079), (643, 29468), (1286, 14734), (2572, 7367)]