21054985

素因数分解:

$5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{5519}}^1$

素因数の和:5640

約数の個数: 16

約数和(自身を含む): 29145600

約数和(自身を除く): 8090615

約数列:

[1, 5, 7, 35, 109, 545, 763, 3815, 5519, 27595, 38633, 193165, 601571, 3007855, 4210997, 21054985]

約数ペア:

[(1, 21054985), (5, 4210997), (7, 3007855), (35, 601571), (109, 193165), (545, 38633), (763, 27595), (3815, 5519)]