21806281

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{1291}}^1$

素因数の和:1444

約数の個数: 16

約数和(自身を含む): 26460160

約数和(自身を除く): 4653879

約数列:

[1, 7, 19, 127, 133, 889, 1291, 2413, 9037, 16891, 24529, 163957, 171703, 1147699, 3115183, 21806281]

約数ペア:

[(1, 21806281), (7, 3115183), (19, 1147699), (127, 171703), (133, 163957), (889, 24529), (1291, 16891), (2413, 9037)]