19908008

素因数分解:

$2^3\times {\mathrm{509}}^1\times {\mathrm{4889}}^1$

素因数の和:5404

約数の個数: 16

約数和(自身を含む): 37408500

約数和(自身を除く): 17500492

約数列:

[1, 2, 4, 8, 509, 1018, 2036, 4072, 4889, 9778, 19556, 39112, 2488501, 4977002, 9954004, 19908008]

約数ペア:

[(1, 19908008), (2, 9954004), (4, 4977002), (8, 2488501), (509, 39112), (1018, 19556), (2036, 9778), (4072, 4889)]