21447257

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2801}}^1$

素因数の和:2864

約数の個数: 16

約数和(自身を含む): 25105920

約数和(自身を除く): 3658663

約数列:

[1, 13, 19, 31, 247, 403, 589, 2801, 7657, 36413, 53219, 86831, 691847, 1128803, 1649789, 21447257]

約数ペア:

[(1, 21447257), (13, 1649789), (19, 1128803), (31, 691847), (247, 86831), (403, 53219), (589, 36413), (2801, 7657)]