21189940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55763}}^1$

素因数の和:55791

約数の個数: 24

約数和(自身を含む): 46841760

約数和(自身を除く): 25651820

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55763, 111526, 223052, 278815, 557630, 1059497, 1115260, 2118994, 4237988, 5297485, 10594970, 21189940]

約数ペア:

[(1, 21189940), (2, 10594970), (4, 5297485), (5, 4237988), (10, 2118994), (19, 1115260), (20, 1059497), (38, 557630), (76, 278815), (95, 223052), (190, 111526), (380, 55763)]