639918

素因数分解:

$2^1\times 3^2\times {\mathrm{73}}^1\times {\mathrm{487}}^1$

素因数の和:568

約数の個数: 24

約数和(自身を含む): 1408368

約数和(自身を除く): 768450

約数列:

[1, 2, 3, 6, 9, 18, 73, 146, 219, 438, 487, 657, 974, 1314, 1461, 2922, 4383, 8766, 35551, 71102, 106653, 213306, 319959, 639918]

約数ペア:

[(1, 639918), (2, 319959), (3, 213306), (6, 106653), (9, 71102), (18, 35551), (73, 8766), (146, 4383), (219, 2922), (438, 1461), (487, 1314), (657, 974)]