21653884

素因数分解:

$2^2\times 7^2\times {\mathrm{110479}}^1$

素因数の和:110497

約数の個数: 18

約数和(自身を含む): 44081520

約数和(自身を除く): 22427636

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 110479, 220958, 441916, 773353, 1546706, 3093412, 5413471, 10826942, 21653884]

約数ペア:

[(1, 21653884), (2, 10826942), (4, 5413471), (7, 3093412), (14, 1546706), (28, 773353), (49, 441916), (98, 220958), (196, 110479)]