18978610

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1979}}^1$

素因数の和:2130

約数の個数: 32

約数和(自身を含む): 39346560

約数和(自身を除く): 20367950

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 137, 274, 685, 959, 1370, 1918, 1979, 3958, 4795, 9590, 9895, 13853, 19790, 27706, 69265, 138530, 271123, 542246, 1355615, 1897861, 2711230, 3795722, 9489305, 18978610]

約数ペア:

[(1, 18978610), (2, 9489305), (5, 3795722), (7, 2711230), (10, 1897861), (14, 1355615), (35, 542246), (70, 271123), (137, 138530), (274, 69265), (685, 27706), (959, 19790), (1370, 13853), (1918, 9895), (1979, 9590), (3958, 4795)]