19904984

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{20563}}^1$

素因数の和:20591

約数の個数: 24

約数和(自身を含む): 41025180

約数和(自身を除く): 21120196

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 121, 242, 484, 968, 20563, 41126, 82252, 164504, 226193, 452386, 904772, 1809544, 2488123, 4976246, 9952492, 19904984]

約数ペア:

[(1, 19904984), (2, 9952492), (4, 4976246), (8, 2488123), (11, 1809544), (22, 904772), (44, 452386), (88, 226193), (121, 164504), (242, 82252), (484, 41126), (968, 20563)]