20820905

素因数分解:

$5^1\times 7^1\times {\mathrm{653}}^1\times {\mathrm{911}}^1$

素因数の和:1576

約数の個数: 16

約数和(自身を含む): 28629504

約数和(自身を除く): 7808599

約数列:

[1, 5, 7, 35, 653, 911, 3265, 4555, 4571, 6377, 22855, 31885, 594883, 2974415, 4164181, 20820905]

約数ペア:

[(1, 20820905), (5, 4164181), (7, 2974415), (35, 594883), (653, 31885), (911, 22855), (3265, 6377), (4555, 4571)]