21299020

素因数分解:

$2^2\times 5^1\times {\mathrm{1064951}}^1$

素因数の和:1064960

約数の個数: 12

約数和(自身を含む): 44727984

約数和(自身を除く): 23428964

約数列:

[1, 2, 4, 5, 10, 20, 1064951, 2129902, 4259804, 5324755, 10649510, 21299020]

約数ペア:

[(1, 21299020), (2, 10649510), (4, 5324755), (5, 4259804), (10, 2129902), (20, 1064951)]