28402540

素因数分解:

$2^2\times 5^1\times {\mathrm{709}}^1\times {\mathrm{2003}}^1$

素因数の和:2721

約数の個数: 24

約数和(自身を含む): 59759280

約数和(自身を除く): 31356740

約数列:

[1, 2, 4, 5, 10, 20, 709, 1418, 2003, 2836, 3545, 4006, 7090, 8012, 10015, 14180, 20030, 40060, 1420127, 2840254, 5680508, 7100635, 14201270, 28402540]

約数ペア:

[(1, 28402540), (2, 14201270), (4, 7100635), (5, 5680508), (10, 2840254), (20, 1420127), (709, 40060), (1418, 20030), (2003, 14180), (2836, 10015), (3545, 8012), (4006, 7090)]