20807984

素因数分解:

$2^4\times {\mathrm{331}}^1\times {\mathrm{3929}}^1$

素因数の和:4268

約数の個数: 20

約数和(自身を含む): 40447560

約数和(自身を除く): 19639576

約数列:

[1, 2, 4, 8, 16, 331, 662, 1324, 2648, 3929, 5296, 7858, 15716, 31432, 62864, 1300499, 2600998, 5201996, 10403992, 20807984]

約数ペア:

[(1, 20807984), (2, 10403992), (4, 5201996), (8, 2600998), (16, 1300499), (331, 62864), (662, 31432), (1324, 15716), (2648, 7858), (3929, 5296)]