21576440

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5237}}^1$

素因数の和:5351

約数の個数: 32

約数和(自身を含む): 49027680

約数和(自身を除く): 27451240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5237, 10474, 20948, 26185, 41896, 52370, 104740, 209480, 539411, 1078822, 2157644, 2697055, 4315288, 5394110, 10788220, 21576440]

約数ペア:

[(1, 21576440), (2, 10788220), (4, 5394110), (5, 4315288), (8, 2697055), (10, 2157644), (20, 1078822), (40, 539411), (103, 209480), (206, 104740), (412, 52370), (515, 41896), (824, 26185), (1030, 20948), (2060, 10474), (4120, 5237)]