20389628

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{17761}}^1$

素因数の和:17813

約数の個数: 24

約数和(自身を含む): 41776224

約数和(自身を除く): 21386596

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 17761, 35522, 71044, 124327, 248654, 497308, 728201, 1456402, 2912804, 5097407, 10194814, 20389628]

約数ペア:

[(1, 20389628), (2, 10194814), (4, 5097407), (7, 2912804), (14, 1456402), (28, 728201), (41, 497308), (82, 248654), (164, 124327), (287, 71044), (574, 35522), (1148, 17761)]