21992476

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{45439}}^1$

素因数の和:45465

約数の個数: 18

約数和(自身を含む): 42304640

約数和(自身を除く): 20312164

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 45439, 90878, 181756, 499829, 999658, 1999316, 5498119, 10996238, 21992476]

約数ペア:

[(1, 21992476), (2, 10996238), (4, 5498119), (11, 1999316), (22, 999658), (44, 499829), (121, 181756), (242, 90878), (484, 45439)]