20015681

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 25878528

約数和(自身を除く): 5862847

約数列:

[1, 7, 17, 23, 71, 103, 119, 161, 391, 497, 721, 1207, 1633, 1751, 2369, 2737, 7313, 8449, 11431, 12257, 16583, 27761, 40273, 51191, 124321, 168199, 194327, 281911, 870247, 1177393, 2859383, 20015681]

約数ペア:

[(1, 20015681), (7, 2859383), (17, 1177393), (23, 870247), (71, 281911), (103, 194327), (119, 168199), (161, 124321), (391, 51191), (497, 40273), (721, 27761), (1207, 16583), (1633, 12257), (1751, 11431), (2369, 8449), (2737, 7313)]