20678740

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{353}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 45496080

約数和(自身を除く): 24817340

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 101, 116, 145, 202, 290, 353, 404, 505, 580, 706, 1010, 1412, 1765, 2020, 2929, 3530, 5858, 7060, 10237, 11716, 14645, 20474, 29290, 35653, 40948, 51185, 58580, 71306, 102370, 142612, 178265, 204740, 356530, 713060, 1033937, 2067874, 4135748, 5169685, 10339370, 20678740]

約数ペア:

[(1, 20678740), (2, 10339370), (4, 5169685), (5, 4135748), (10, 2067874), (20, 1033937), (29, 713060), (58, 356530), (101, 204740), (116, 178265), (145, 142612), (202, 102370), (290, 71306), (353, 58580), (404, 51185), (505, 40948), (580, 35653), (706, 29290), (1010, 20474), (1412, 14645), (1765, 11716), (2020, 10237), (2929, 7060), (3530, 5858)]