21978836

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{499519}}^1$

素因数の和:499534

約数の個数: 12

約数和(自身を含む): 41959680

約数和(自身を除く): 19980844

約数列:

[1, 2, 4, 11, 22, 44, 499519, 999038, 1998076, 5494709, 10989418, 21978836]

約数ペア:

[(1, 21978836), (2, 10989418), (4, 5494709), (11, 1998076), (22, 999038), (44, 499519)]