639626

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{337}}^1$

素因数の和:425

約数の個数: 16

約数和(自身を含む): 1050504

約数和(自身を除く): 410878

約数列:

[1, 2, 13, 26, 73, 146, 337, 674, 949, 1898, 4381, 8762, 24601, 49202, 319813, 639626]

約数ペア:

[(1, 639626), (2, 319813), (13, 49202), (26, 24601), (73, 8762), (146, 4381), (337, 1898), (674, 949)]