201980180

素因数分解:

$2^2\times 5^1\times {\mathrm{10099009}}^1$

素因数の和:10099018

約数の個数: 12

約数和(自身を含む): 424158420

約数和(自身を除く): 222178240

約数列:

[1, 2, 4, 5, 10, 20, 10099009, 20198018, 40396036, 50495045, 100990090, 201980180]

約数ペア:

[(1, 201980180), (2, 100990090), (4, 50495045), (5, 40396036), (10, 20198018), (20, 10099009)]