21000359620

素因数分解:

$2^2\times 5^1\times {\mathrm{1050017981}}^1$

素因数の和:1050017990

約数の個数: 12

約数和(自身を含む): 44100755244

約数和(自身を除く): 23100395624

約数列:

[1, 2, 4, 5, 10, 20, 1050017981, 2100035962, 4200071924, 5250089905, 10500179810, 21000359620]

約数ペア:

[(1, 21000359620), (2, 10500179810), (4, 5250089905), (5, 4200071924), (10, 2100035962), (20, 1050017981)]