21003745

素因数分解:

$5^1\times 7^1\times {\mathrm{653}}^1\times {\mathrm{919}}^1$

素因数の和:1584

約数の個数: 16

約数和(自身を含む): 28880640

約数和(自身を除く): 7876895

約数列:

[1, 5, 7, 35, 653, 919, 3265, 4571, 4595, 6433, 22855, 32165, 600107, 3000535, 4200749, 21003745]

約数ペア:

[(1, 21003745), (5, 4200749), (7, 3000535), (35, 600107), (653, 32165), (919, 22855), (3265, 6433), (4571, 4595)]