20820443

素因数分解:

$7^3\times {\mathrm{101}}^1\times {\mathrm{601}}^1$

素因数の和:723

約数の個数: 16

約数和(自身を含む): 24561600

約数和(自身を除く): 3741157

約数列:

[1, 7, 49, 101, 343, 601, 707, 4207, 4949, 29449, 34643, 60701, 206143, 424907, 2974349, 20820443]

約数ペア:

[(1, 20820443), (7, 2974349), (49, 424907), (101, 206143), (343, 60701), (601, 34643), (707, 29449), (4207, 4949)]