20349820

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1999}}^1$

素因数の和:2517

約数の個数: 24

約数和(自身を含む): 42840000

約数和(自身を除く): 22490180

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1999, 2036, 2545, 3998, 5090, 7996, 9995, 10180, 19990, 39980, 1017491, 2034982, 4069964, 5087455, 10174910, 20349820]

約数ペア:

[(1, 20349820), (2, 10174910), (4, 5087455), (5, 4069964), (10, 2034982), (20, 1017491), (509, 39980), (1018, 19990), (1999, 10180), (2036, 9995), (2545, 7996), (3998, 5090)]