21850490

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5449}}^1$

素因数の和:5857

約数の個数: 16

約数和(自身を含む): 39436200

約数和(自身を除く): 17585710

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5449, 10898, 27245, 54490, 2185049, 4370098, 10925245, 21850490]

約数ペア:

[(1, 21850490), (2, 10925245), (5, 4370098), (10, 2185049), (401, 54490), (802, 27245), (2005, 10898), (4010, 5449)]