20209028

素因数分解:

$2^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{9887}}^1$

素因数の和:9971

約数の個数: 24

約数和(自身を含む): 40975872

約数和(自身を除く): 20766844

約数列:

[1, 2, 4, 7, 14, 28, 73, 146, 292, 511, 1022, 2044, 9887, 19774, 39548, 69209, 138418, 276836, 721751, 1443502, 2887004, 5052257, 10104514, 20209028]

約数ペア:

[(1, 20209028), (2, 10104514), (4, 5052257), (7, 2887004), (14, 1443502), (28, 721751), (73, 276836), (146, 138418), (292, 69209), (511, 39548), (1022, 19774), (2044, 9887)]