201981820

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{99991}}^1$

素因数の和:100101

約数の個数: 24

約数和(自身を含む): 428365728

約数和(自身を除く): 226383908

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 99991, 199982, 399964, 499955, 999910, 1999820, 10099091, 20198182, 40396364, 50495455, 100990910, 201981820]

約数ペア:

[(1, 201981820), (2, 100990910), (4, 50495455), (5, 40396364), (10, 20198182), (20, 10099091), (101, 1999820), (202, 999910), (404, 499955), (505, 399964), (1010, 199982), (2020, 99991)]