638740

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:411

約数の個数: 24

約数和(自身を含む): 1358280

約数和(自身を除く): 719540

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 293, 436, 545, 586, 1090, 1172, 1465, 2180, 2930, 5860, 31937, 63874, 127748, 159685, 319370, 638740]

約数ペア:

[(1, 638740), (2, 319370), (4, 159685), (5, 127748), (10, 63874), (20, 31937), (109, 5860), (218, 2930), (293, 2180), (436, 1465), (545, 1172), (586, 1090)]