20087305

素因数分解:

$5^1\times 7^2\times {\mathrm{163}}^1\times {\mathrm{503}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 28268352

約数和(自身を除く): 8181047

約数列:

[1, 5, 7, 35, 49, 163, 245, 503, 815, 1141, 2515, 3521, 5705, 7987, 17605, 24647, 39935, 81989, 123235, 409945, 573923, 2869615, 4017461, 20087305]

約数ペア:

[(1, 20087305), (5, 4017461), (7, 2869615), (35, 573923), (49, 409945), (163, 123235), (245, 81989), (503, 39935), (815, 24647), (1141, 17605), (2515, 7987), (3521, 5705)]