21128336

素因数分解:

$2^4\times {\mathrm{269}}^1\times {\mathrm{4909}}^1$

素因数の和:5186

約数の個数: 20

約数和(自身を含む): 41096700

約数和(自身を除く): 19968364

約数列:

[1, 2, 4, 8, 16, 269, 538, 1076, 2152, 4304, 4909, 9818, 19636, 39272, 78544, 1320521, 2641042, 5282084, 10564168, 21128336]

約数ペア:

[(1, 21128336), (2, 10564168), (4, 5282084), (8, 2641042), (16, 1320521), (269, 78544), (538, 39272), (1076, 19636), (2152, 9818), (4304, 4909)]