201981380

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{19841}}^1$

素因数の和:20359

約数の個数: 24

約数和(自身を含む): 425015640

約数和(自身を除く): 223034260

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2545, 5090, 10180, 19841, 39682, 79364, 99205, 198410, 396820, 10099069, 20198138, 40396276, 50495345, 100990690, 201981380]

約数ペア:

[(1, 201981380), (2, 100990690), (4, 50495345), (5, 40396276), (10, 20198138), (20, 10099069), (509, 396820), (1018, 198410), (2036, 99205), (2545, 79364), (5090, 39682), (10180, 19841)]