20804408

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{353}}^1$

素因数の和:551

約数の個数: 32

約数和(自身を含む): 40143600

約数和(自身を除く): 19339192

約数列:

[1, 2, 4, 8, 53, 106, 139, 212, 278, 353, 424, 556, 706, 1112, 1412, 2824, 7367, 14734, 18709, 29468, 37418, 49067, 58936, 74836, 98134, 149672, 196268, 392536, 2600551, 5201102, 10402204, 20804408]

約数ペア:

[(1, 20804408), (2, 10402204), (4, 5201102), (8, 2600551), (53, 392536), (106, 196268), (139, 149672), (212, 98134), (278, 74836), (353, 58936), (424, 49067), (556, 37418), (706, 29468), (1112, 18709), (1412, 14734), (2824, 7367)]