686282020

素因数分解:

$2^2\times 5^1\times {\mathrm{3449}}^1\times {\mathrm{9949}}^1$

素因数の和:13407

約数の個数: 24

約数和(自身を含む): 1441755000

約数和(自身を除く): 755472980

約数列:

[1, 2, 4, 5, 10, 20, 3449, 6898, 9949, 13796, 17245, 19898, 34490, 39796, 49745, 68980, 99490, 198980, 34314101, 68628202, 137256404, 171570505, 343141010, 686282020]

約数ペア:

[(1, 686282020), (2, 343141010), (4, 171570505), (5, 137256404), (10, 68628202), (20, 34314101), (3449, 198980), (6898, 99490), (9949, 68980), (13796, 49745), (17245, 39796), (19898, 34490)]