20386640

素因数分解:

$2^4\times 5^1\times {\mathrm{254833}}^1$

素因数の和:254846

約数の個数: 20

約数和(自身を含む): 47399124

約数和(自身を除く): 27012484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254833, 509666, 1019332, 1274165, 2038664, 2548330, 4077328, 5096660, 10193320, 20386640]

約数ペア:

[(1, 20386640), (2, 10193320), (4, 5096660), (5, 4077328), (8, 2548330), (10, 2038664), (16, 1274165), (20, 1019332), (40, 509666), (80, 254833)]