21184880

素因数分解:

$2^4\times 5^1\times {\mathrm{264811}}^1$

素因数の和:264824

約数の個数: 20

約数和(自身を含む): 49255032

約数和(自身を除く): 28070152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264811, 529622, 1059244, 1324055, 2118488, 2648110, 4236976, 5296220, 10592440, 21184880]

約数ペア:

[(1, 21184880), (2, 10592440), (4, 5296220), (5, 4236976), (8, 2648110), (10, 2118488), (16, 1324055), (20, 1059244), (40, 529622), (80, 264811)]