640890.0000000

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{4349}}^1$

素因数の和:4392

約数の個数: 32

約数和(自身を含む): 18792000

約数和(自身を除く): 9963530

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 406, 1015, 2030, 4349, 8698, 21745, 30443, 43490, 60886, 126121, 152215, 252242, 304430, 630605, 882847, 1261210, 1765694, 4414235, 8828470]

約数ペア:

[(1, 8828470), (2, 4414235), (5, 1765694), (7, 1261210), (10, 882847), (14, 630605), (29, 304430), (35, 252242), (58, 152215), (70, 126121), (145, 60886), (203, 43490), (290, 30443), (406, 21745), (1015, 8698), (2030, 4349)]