20173839

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 13971441

約数列:

[1, 3, 7, 19, 21, 31, 49, 57, 93, 133, 147, 217, 233, 399, 589, 651, 699, 931, 1519, 1631, 1767, 2793, 4123, 4427, 4557, 4893, 7223, 11417, 12369, 13281, 21669, 28861, 30989, 34251, 50561, 86583, 92967, 137237, 151683, 216923, 353927, 411711, 650769, 960659, 1061781, 2881977, 6724613, 20173839]

約数ペア:

[(1, 20173839), (3, 6724613), (7, 2881977), (19, 1061781), (21, 960659), (31, 650769), (49, 411711), (57, 353927), (93, 216923), (133, 151683), (147, 137237), (217, 92967), (233, 86583), (399, 50561), (589, 34251), (651, 30989), (699, 28861), (931, 21669), (1519, 13281), (1631, 12369), (1767, 11417), (2793, 7223), (4123, 4893), (4427, 4557)]