21078224

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{3221}}^1$

素因数の和:3638

約数の個数: 20

約数和(自身を含む): 40951620

約数和(自身を除く): 19873396

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3221, 3272, 6442, 6544, 12884, 25768, 51536, 1317389, 2634778, 5269556, 10539112, 21078224]

約数ペア:

[(1, 21078224), (2, 10539112), (4, 5269556), (8, 2634778), (16, 1317389), (409, 51536), (818, 25768), (1636, 12884), (3221, 6544), (3272, 6442)]