28211380

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{12941}}^1$

素因数の和:13059

約数の個数: 24

約数和(自身を含む): 59792040

約数和(自身を除く): 31580660

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 12941, 25882, 51764, 64705, 129410, 258820, 1410569, 2821138, 5642276, 7052845, 14105690, 28211380]

約数ペア:

[(1, 28211380), (2, 14105690), (4, 7052845), (5, 5642276), (10, 2821138), (20, 1410569), (109, 258820), (218, 129410), (436, 64705), (545, 51764), (1090, 25882), (2180, 12941)]