209978156

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{990463}}^1$

素因数の和:990520

約数の個数: 12

約数和(自身を含む): 374395392

約数和(自身を除く): 164417236

約数列:

[1, 2, 4, 53, 106, 212, 990463, 1980926, 3961852, 52494539, 104989078, 209978156]

約数ペア:

[(1, 209978156), (2, 104989078), (4, 52494539), (53, 3961852), (106, 1980926), (212, 990463)]