19984699

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:275

約数の個数: 24

約数和(自身を含む): 24363168

約数和(自身を除く): 4378469

約数列:

[1, 7, 37, 49, 73, 151, 259, 511, 1057, 1813, 2701, 3577, 5587, 7399, 11023, 18907, 39109, 77161, 132349, 273763, 407851, 540127, 2854957, 19984699]

約数ペア:

[(1, 19984699), (7, 2854957), (37, 540127), (49, 407851), (73, 273763), (151, 132349), (259, 77161), (511, 39109), (1057, 18907), (1813, 11023), (2701, 7399), (3577, 5587)]