128783907

素因数分解:

$3^2\times 7^2\times {\mathrm{292027}}^1$

素因数の和:292047

約数の個数: 18

約数和(自身を含む): 216392748

約数和(自身を除く): 87608841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 292027, 876081, 2044189, 2628243, 6132567, 14309323, 18397701, 42927969, 128783907]

約数ペア:

[(1, 128783907), (3, 42927969), (7, 18397701), (9, 14309323), (21, 6132567), (49, 2628243), (63, 2044189), (147, 876081), (441, 292027)]