19991344

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{65761}}^1$

素因数の和:65788

約数の個数: 20

約数和(自身を含む): 40772440

約数和(自身を除く): 20781096

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 65761, 131522, 263044, 526088, 1052176, 1249459, 2498918, 4997836, 9995672, 19991344]

約数ペア:

[(1, 19991344), (2, 9995672), (4, 4997836), (8, 2498918), (16, 1249459), (19, 1052176), (38, 526088), (76, 263044), (152, 131522), (304, 65761)]