21399567

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53633}}^1$

素因数の和:53662

約数の個数: 16

約数和(自身を含む): 34325760

約数和(自身を除く): 12926193

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53633, 160899, 375431, 1019027, 1126293, 3057081, 7133189, 21399567]

約数ペア:

[(1, 21399567), (3, 7133189), (7, 3057081), (19, 1126293), (21, 1019027), (57, 375431), (133, 160899), (399, 53633)]