20900290

素因数分解:

$2^1\times 5^1\times {\mathrm{947}}^1\times {\mathrm{2207}}^1$

素因数の和:3161

約数の個数: 16

約数和(自身を含む): 37677312

約数和(自身を除く): 16777022

約数列:

[1, 2, 5, 10, 947, 1894, 2207, 4414, 4735, 9470, 11035, 22070, 2090029, 4180058, 10450145, 20900290]

約数ペア:

[(1, 20900290), (2, 10450145), (5, 4180058), (10, 2090029), (947, 22070), (1894, 11035), (2207, 9470), (4414, 4735)]