20999984

素因数分解:

$2^4\times {\mathrm{257}}^1\times {\mathrm{5107}}^1$

素因数の和:5372

約数の個数: 20

約数和(自身を含む): 40853784

約数和(自身を除く): 19853800

約数列:

[1, 2, 4, 8, 16, 257, 514, 1028, 2056, 4112, 5107, 10214, 20428, 40856, 81712, 1312499, 2624998, 5249996, 10499992, 20999984]

約数ペア:

[(1, 20999984), (2, 10499992), (4, 5249996), (8, 2624998), (16, 1312499), (257, 81712), (514, 40856), (1028, 20428), (2056, 10214), (4112, 5107)]