21939815

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{1783}}^1$

素因数の和:1918

約数の個数: 16

約数和(自身を含む): 27744768

約数和(自身を除く): 5804953

約数列:

[1, 5, 23, 107, 115, 535, 1783, 2461, 8915, 12305, 41009, 190781, 205045, 953905, 4387963, 21939815]

約数ペア:

[(1, 21939815), (5, 4387963), (23, 953905), (107, 205045), (115, 190781), (535, 41009), (1783, 12305), (2461, 8915)]