201998990

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{199999}}^1$

素因数の和:200107

約数の個数: 16

約数和(自身を含む): 367200000

約数和(自身を除く): 165201010

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 199999, 399998, 999995, 1999990, 20199899, 40399798, 100999495, 201998990]

約数ペア:

[(1, 201998990), (2, 100999495), (5, 40399798), (10, 20199899), (101, 1999990), (202, 999995), (505, 399998), (1010, 199999)]