20671280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{36913}}^1$

素因数の和:36933

約数の個数: 40

約数和(自身を含む): 54928032

約数和(自身を除く): 34256752

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 36913, 73826, 147652, 184565, 258391, 295304, 369130, 516782, 590608, 738260, 1033564, 1291955, 1476520, 2067128, 2583910, 2953040, 4134256, 5167820, 10335640, 20671280]

約数ペア:

[(1, 20671280), (2, 10335640), (4, 5167820), (5, 4134256), (7, 2953040), (8, 2583910), (10, 2067128), (14, 1476520), (16, 1291955), (20, 1033564), (28, 738260), (35, 590608), (40, 516782), (56, 369130), (70, 295304), (80, 258391), (112, 184565), (140, 147652), (280, 73826), (560, 36913)]