20419623

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2437}}^1$

素因数の和:2476

約数の個数: 36

約数和(自身を含む): 36131160

約数和(自身を除く): 15711537

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2437, 2793, 7311, 8379, 17059, 21933, 46303, 51177, 119413, 138909, 153531, 324121, 358239, 416727, 972363, 1074717, 2268847, 2917089, 6806541, 20419623]

約数ペア:

[(1, 20419623), (3, 6806541), (7, 2917089), (9, 2268847), (19, 1074717), (21, 972363), (49, 416727), (57, 358239), (63, 324121), (133, 153531), (147, 138909), (171, 119413), (399, 51177), (441, 46303), (931, 21933), (1197, 17059), (2437, 8379), (2793, 7311)]