20488120

素因数分解:

$2^3\times 5^1\times {\mathrm{353}}^1\times {\mathrm{1451}}^1$

素因数の和:1815

約数の個数: 32

約数和(自身を含む): 46260720

約数和(自身を除く): 25772600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 353, 706, 1412, 1451, 1765, 2824, 2902, 3530, 5804, 7060, 7255, 11608, 14120, 14510, 29020, 58040, 512203, 1024406, 2048812, 2561015, 4097624, 5122030, 10244060, 20488120]

約数ペア:

[(1, 20488120), (2, 10244060), (4, 5122030), (5, 4097624), (8, 2561015), (10, 2048812), (20, 1024406), (40, 512203), (353, 58040), (706, 29020), (1412, 14510), (1451, 14120), (1765, 11608), (2824, 7255), (2902, 7060), (3530, 5804)]