21066820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55439}}^1$

素因数の和:55467

約数の個数: 24

約数和(自身を含む): 46569600

約数和(自身を除く): 25502780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55439, 110878, 221756, 277195, 554390, 1053341, 1108780, 2106682, 4213364, 5266705, 10533410, 21066820]

約数ペア:

[(1, 21066820), (2, 10533410), (4, 5266705), (5, 4213364), (10, 2106682), (19, 1108780), (20, 1053341), (38, 554390), (76, 277195), (95, 221756), (190, 110878), (380, 55439)]