20406490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1987}}^1$

素因数の和:2086

約数の個数: 32

約数和(自身を含む): 40078080

約数和(自身を除く): 19671590

約数列:

[1, 2, 5, 10, 13, 26, 65, 79, 130, 158, 395, 790, 1027, 1987, 2054, 3974, 5135, 9935, 10270, 19870, 25831, 51662, 129155, 156973, 258310, 313946, 784865, 1569730, 2040649, 4081298, 10203245, 20406490]

約数ペア:

[(1, 20406490), (2, 10203245), (5, 4081298), (10, 2040649), (13, 1569730), (26, 784865), (65, 313946), (79, 258310), (130, 156973), (158, 129155), (395, 51662), (790, 25831), (1027, 19870), (1987, 10270), (2054, 9935), (3974, 5135)]