20905864

素因数分解:

$2^3\times 7^1\times {\mathrm{577}}^1\times {\mathrm{647}}^1$

素因数の和:1237

約数の個数: 32

約数和(自身を含む): 44945280

約数和(自身を除く): 24039416

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 577, 647, 1154, 1294, 2308, 2588, 4039, 4529, 4616, 5176, 8078, 9058, 16156, 18116, 32312, 36232, 373319, 746638, 1493276, 2613233, 2986552, 5226466, 10452932, 20905864]

約数ペア:

[(1, 20905864), (2, 10452932), (4, 5226466), (7, 2986552), (8, 2613233), (14, 1493276), (28, 746638), (56, 373319), (577, 36232), (647, 32312), (1154, 18116), (1294, 16156), (2308, 9058), (2588, 8078), (4039, 5176), (4529, 4616)]