81450440

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20161}}^1$

素因数の和:20273

約数の個数: 32

約数和(自身を含む): 185087160

約数和(自身を除く): 103636720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 20161, 40322, 80644, 100805, 161288, 201610, 403220, 806440, 2036261, 4072522, 8145044, 10181305, 16290088, 20362610, 40725220, 81450440]

約数ペア:

[(1, 81450440), (2, 40725220), (4, 20362610), (5, 16290088), (8, 10181305), (10, 8145044), (20, 4072522), (40, 2036261), (101, 806440), (202, 403220), (404, 201610), (505, 161288), (808, 100805), (1010, 80644), (2020, 40322), (4040, 20161)]