19999445

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1\times {\mathrm{349}}^1$

素因数の和:584

約数の個数: 16

約数和(自身を含む): 24553200

約数和(自身を除く): 4553755

約数列:

[1, 5, 73, 157, 349, 365, 785, 1745, 11461, 25477, 54793, 57305, 127385, 273965, 3999889, 19999445]

約数ペア:

[(1, 19999445), (5, 3999889), (73, 273965), (157, 127385), (349, 57305), (365, 54793), (785, 25477), (1745, 11461)]