85878140

素因数分解:

$2^2\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{2161}}^1$

素因数の和:4157

約数の個数: 24

約数和(自身を含む): 180518352

約数和(自身を除く): 94640212

約数列:

[1, 2, 4, 5, 10, 20, 1987, 2161, 3974, 4322, 7948, 8644, 9935, 10805, 19870, 21610, 39740, 43220, 4293907, 8587814, 17175628, 21469535, 42939070, 85878140]

約数ペア:

[(1, 85878140), (2, 42939070), (4, 21469535), (5, 17175628), (10, 8587814), (20, 4293907), (1987, 43220), (2161, 39740), (3974, 21610), (4322, 19870), (7948, 10805), (8644, 9935)]