647824

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{2131}}^1$

素因数の和:2158

約数の個数: 20

約数和(自身を含む): 1321840

約数和(自身を除く): 674016

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 2131, 4262, 8524, 17048, 34096, 40489, 80978, 161956, 323912, 647824]

約数ペア:

[(1, 647824), (2, 323912), (4, 161956), (8, 80978), (16, 40489), (19, 34096), (38, 17048), (76, 8524), (152, 4262), (304, 2131)]