20658620

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6337}}^1$

素因数の和:6509

約数の個数: 24

約数和(自身を含む): 43656144

約数和(自身を除く): 22997524

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6337, 12674, 25348, 31685, 63370, 126740, 1032931, 2065862, 4131724, 5164655, 10329310, 20658620]

約数ペア:

[(1, 20658620), (2, 10329310), (4, 5164655), (5, 4131724), (10, 2065862), (20, 1032931), (163, 126740), (326, 63370), (652, 31685), (815, 25348), (1630, 12674), (3260, 6337)]