20418916

素因数分解:

$2^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{1783}}^1$

素因数の和:2203

約数の個数: 24

約数和(自身を含む): 40960640

約数和(自身を除く): 20541724

約数列:

[1, 2, 4, 7, 14, 28, 409, 818, 1636, 1783, 2863, 3566, 5726, 7132, 11452, 12481, 24962, 49924, 729247, 1458494, 2916988, 5104729, 10209458, 20418916]

約数ペア:

[(1, 20418916), (2, 10209458), (4, 5104729), (7, 2916988), (14, 1458494), (28, 729247), (409, 49924), (818, 24962), (1636, 12481), (1783, 11452), (2863, 7132), (3566, 5726)]