640042

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:357

約数の個数: 16

約数和(自身を含む): 1048320

約数和(自身を除く): 408278

約数列:

[1, 2, 13, 26, 103, 206, 239, 478, 1339, 2678, 3107, 6214, 24617, 49234, 320021, 640042]

約数ペア:

[(1, 640042), (2, 320021), (13, 49234), (26, 24617), (103, 6214), (206, 3107), (239, 2678), (478, 1339)]