19997870

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{4987}}^1$

素因数の和:5395

約数の個数: 16

約数和(自身を含む): 36093168

約数和(自身を除く): 16095298

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 4987, 9974, 24935, 49870, 1999787, 3999574, 9998935, 19997870]

約数ペア:

[(1, 19997870), (2, 9998935), (5, 3999574), (10, 1999787), (401, 49870), (802, 24935), (2005, 9974), (4010, 4987)]