18980297

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:118

約数の個数: 36

約数和(自身を含む): 24757380

約数和(自身を除く): 5777083

約数列:

[1, 7, 19, 29, 37, 49, 133, 203, 259, 361, 551, 703, 931, 1073, 1421, 1813, 2527, 3857, 4921, 7511, 10469, 13357, 17689, 20387, 26999, 34447, 52577, 73283, 93499, 142709, 387353, 512981, 654493, 998963, 2711471, 18980297]

約数ペア:

[(1, 18980297), (7, 2711471), (19, 998963), (29, 654493), (37, 512981), (49, 387353), (133, 142709), (203, 93499), (259, 73283), (361, 52577), (551, 34447), (703, 26999), (931, 20387), (1073, 17689), (1421, 13357), (1813, 10469), (2527, 7511), (3857, 4921)]