20607680

素因数分解:

$2^6\times 5^1\times {\mathrm{64399}}^1$

素因数の和:64416

約数の個数: 28

約数和(自身を含む): 49072800

約数和(自身を除く): 28465120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 64399, 128798, 257596, 321995, 515192, 643990, 1030384, 1287980, 2060768, 2575960, 4121536, 5151920, 10303840, 20607680]

約数ペア:

[(1, 20607680), (2, 10303840), (4, 5151920), (5, 4121536), (8, 2575960), (10, 2060768), (16, 1287980), (20, 1030384), (32, 643990), (40, 515192), (64, 321995), (80, 257596), (160, 128798), (320, 64399)]