19718512

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{563}}^1$

素因数の和:781

約数の個数: 40

約数和(自身を含む): 41961600

約数和(自身を除く): 22243088

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 199, 398, 563, 796, 1126, 1592, 2189, 2252, 3184, 4378, 4504, 6193, 8756, 9008, 12386, 17512, 24772, 35024, 49544, 99088, 112037, 224074, 448148, 896296, 1232407, 1792592, 2464814, 4929628, 9859256, 19718512]

約数ペア:

[(1, 19718512), (2, 9859256), (4, 4929628), (8, 2464814), (11, 1792592), (16, 1232407), (22, 896296), (44, 448148), (88, 224074), (176, 112037), (199, 99088), (398, 49544), (563, 35024), (796, 24772), (1126, 17512), (1592, 12386), (2189, 9008), (2252, 8756), (3184, 6193), (4378, 4504)]