20503413

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2447}}^1$

素因数の和:2486

約数の個数: 36

約数和(自身を含む): 36279360

約数和(自身を除く): 15775947

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2447, 2793, 7341, 8379, 17129, 22023, 46493, 51387, 119903, 139479, 154161, 325451, 359709, 418437, 976353, 1079127, 2278157, 2929059, 6834471, 20503413]

約数ペア:

[(1, 20503413), (3, 6834471), (7, 2929059), (9, 2278157), (19, 1079127), (21, 976353), (49, 418437), (57, 359709), (63, 325451), (133, 154161), (147, 139479), (171, 119903), (399, 51387), (441, 46493), (931, 22023), (1197, 17129), (2447, 8379), (2793, 7341)]