19981375

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{9403}}^1$

素因数の和:9435

約数の個数: 16

約数和(自身を含む): 26406432

約数和(自身を除く): 6425057

約数列:

[1, 5, 17, 25, 85, 125, 425, 2125, 9403, 47015, 159851, 235075, 799255, 1175375, 3996275, 19981375]

約数ペア:

[(1, 19981375), (5, 3996275), (17, 1175375), (25, 799255), (85, 235075), (125, 159851), (425, 47015), (2125, 9403)]