20684015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 8056081

約数列:

[1, 5, 11, 23, 55, 83, 115, 197, 253, 415, 913, 985, 1265, 1909, 2167, 4531, 4565, 9545, 10835, 16351, 20999, 22655, 49841, 81755, 104995, 179861, 249205, 376073, 899305, 1880365, 4136803, 20684015]

約数ペア:

[(1, 20684015), (5, 4136803), (11, 1880365), (23, 899305), (55, 376073), (83, 249205), (115, 179861), (197, 104995), (253, 81755), (415, 49841), (913, 22655), (985, 20999), (1265, 16351), (1909, 10835), (2167, 9545), (4531, 4565)]