21061852

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 43563520

約数和(自身を除く): 22501668

約数列:

[1, 2, 4, 7, 14, 28, 67, 103, 109, 134, 206, 218, 268, 412, 436, 469, 721, 763, 938, 1442, 1526, 1876, 2884, 3052, 6901, 7303, 11227, 13802, 14606, 22454, 27604, 29212, 44908, 48307, 51121, 78589, 96614, 102242, 157178, 193228, 204484, 314356, 752209, 1504418, 3008836, 5265463, 10530926, 21061852]

約数ペア:

[(1, 21061852), (2, 10530926), (4, 5265463), (7, 3008836), (14, 1504418), (28, 752209), (67, 314356), (103, 204484), (109, 193228), (134, 157178), (206, 102242), (218, 96614), (268, 78589), (412, 51121), (436, 48307), (469, 44908), (721, 29212), (763, 27604), (938, 22454), (1442, 14606), (1526, 13802), (1876, 11227), (2884, 7303), (3052, 6901)]