19803999

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{127}}^1\times {\mathrm{881}}^1$

素因数の和:1070

約数の個数: 16

約数和(自身を含む): 27095040

約数和(自身を除く): 7291041

約数列:

[1, 3, 59, 127, 177, 381, 881, 2643, 7493, 22479, 51979, 111887, 155937, 335661, 6601333, 19803999]

約数ペア:

[(1, 19803999), (3, 6601333), (59, 335661), (127, 155937), (177, 111887), (381, 51979), (881, 22479), (2643, 7493)]