20881796

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{5501}}^1$

素因数の和:5591

約数の個数: 24

約数和(自身を含む): 39900504

約数和(自身を除く): 19018708

約数列:

[1, 2, 4, 13, 26, 52, 73, 146, 292, 949, 1898, 3796, 5501, 11002, 22004, 71513, 143026, 286052, 401573, 803146, 1606292, 5220449, 10440898, 20881796]

約数ペア:

[(1, 20881796), (2, 10440898), (4, 5220449), (13, 1606292), (26, 803146), (52, 401573), (73, 286052), (146, 143026), (292, 71513), (949, 22004), (1898, 11002), (3796, 5501)]