28878520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{65633}}^1$

素因数の和:65655

約数の個数: 32

約数和(自身を含む): 70884720

約数和(自身を除く): 42006200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 65633, 131266, 262532, 328165, 525064, 656330, 721963, 1312660, 1443926, 2625320, 2887852, 3609815, 5775704, 7219630, 14439260, 28878520]

約数ペア:

[(1, 28878520), (2, 14439260), (4, 7219630), (5, 5775704), (8, 3609815), (10, 2887852), (11, 2625320), (20, 1443926), (22, 1312660), (40, 721963), (44, 656330), (55, 525064), (88, 328165), (110, 262532), (220, 131266), (440, 65633)]