21389456

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{121531}}^1$

素因数の和:121550

約数の個数: 20

約数和(自身を含む): 45209904

約数和(自身を除く): 23820448

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 121531, 243062, 486124, 972248, 1336841, 1944496, 2673682, 5347364, 10694728, 21389456]

約数ペア:

[(1, 21389456), (2, 10694728), (4, 5347364), (8, 2673682), (11, 1944496), (16, 1336841), (22, 972248), (44, 486124), (88, 243062), (176, 121531)]