21078220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55469}}^1$

素因数の和:55497

約数の個数: 24

約数和(自身を含む): 46594800

約数和(自身を除く): 25516580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55469, 110938, 221876, 277345, 554690, 1053911, 1109380, 2107822, 4215644, 5269555, 10539110, 21078220]

約数ペア:

[(1, 21078220), (2, 10539110), (4, 5269555), (5, 4215644), (10, 2107822), (19, 1109380), (20, 1053911), (38, 554690), (76, 277345), (95, 221876), (190, 110938), (380, 55469)]