20100028

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{337}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 40278784

約数和(自身を除く): 20178756

約数列:

[1, 2, 4, 13, 26, 31, 37, 52, 62, 74, 124, 148, 337, 403, 481, 674, 806, 962, 1147, 1348, 1612, 1924, 2294, 4381, 4588, 8762, 10447, 12469, 14911, 17524, 20894, 24938, 29822, 41788, 49876, 59644, 135811, 162097, 271622, 324194, 386539, 543244, 648388, 773078, 1546156, 5025007, 10050014, 20100028]

約数ペア:

[(1, 20100028), (2, 10050014), (4, 5025007), (13, 1546156), (26, 773078), (31, 648388), (37, 543244), (52, 386539), (62, 324194), (74, 271622), (124, 162097), (148, 135811), (337, 59644), (403, 49876), (481, 41788), (674, 29822), (806, 24938), (962, 20894), (1147, 17524), (1348, 14911), (1612, 12469), (1924, 10447), (2294, 8762), (4381, 4588)]