217872020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^2\times {\mathrm{2161}}^1$

素因数の和:2312

約数の個数: 36

約数和(自身を含む): 464280852

約数和(自身を除く): 246408832

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 2161, 4322, 5041, 8644, 10082, 10805, 20164, 21610, 25205, 43220, 50410, 100820, 153431, 306862, 613724, 767155, 1534310, 3068620, 10893601, 21787202, 43574404, 54468005, 108936010, 217872020]

約数ペア:

[(1, 217872020), (2, 108936010), (4, 54468005), (5, 43574404), (10, 21787202), (20, 10893601), (71, 3068620), (142, 1534310), (284, 767155), (355, 613724), (710, 306862), (1420, 153431), (2161, 100820), (4322, 50410), (5041, 43220), (8644, 25205), (10082, 21610), (10805, 20164)]