19911169

素因数分解:

${\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:320

約数の個数: 16

約数和(自身を含む): 21461760

約数和(自身を除く): 1550591

約数列:

[1, 23, 71, 89, 137, 1633, 2047, 3151, 6319, 9727, 12193, 145337, 223721, 280439, 865703, 19911169]

約数ペア:

[(1, 19911169), (23, 865703), (71, 280439), (89, 223721), (137, 145337), (1633, 12193), (2047, 9727), (3151, 6319)]