21181060

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{269}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25267580

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 269, 310, 508, 538, 620, 635, 1076, 1270, 1345, 2540, 2690, 3937, 5380, 7874, 8339, 15748, 16678, 19685, 33356, 34163, 39370, 41695, 68326, 78740, 83390, 136652, 166780, 170815, 341630, 683260, 1059053, 2118106, 4236212, 5295265, 10590530, 21181060]

約数ペア:

[(1, 21181060), (2, 10590530), (4, 5295265), (5, 4236212), (10, 2118106), (20, 1059053), (31, 683260), (62, 341630), (124, 170815), (127, 166780), (155, 136652), (254, 83390), (269, 78740), (310, 68326), (508, 41695), (538, 39370), (620, 34163), (635, 33356), (1076, 19685), (1270, 16678), (1345, 15748), (2540, 8339), (2690, 7874), (3937, 5380)]