20805551

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:806

約数の個数: 16

約数和(自身を含む): 23802240

約数和(自身を除く): 2996689

約数列:

[1, 13, 19, 131, 247, 643, 1703, 2489, 8359, 12217, 32357, 84233, 158821, 1095029, 1600427, 20805551]

約数ペア:

[(1, 20805551), (13, 1600427), (19, 1095029), (131, 158821), (247, 84233), (643, 32357), (1703, 12217), (2489, 8359)]