19911555

素因数分解:

$3^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1867}}^1$

素因数の和:1960

約数の個数: 32

約数和(自身を含む): 35865600

約数和(自身を除く): 15954045

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 135, 237, 395, 711, 1185, 1867, 2133, 3555, 5601, 9335, 10665, 16803, 28005, 50409, 84015, 147493, 252045, 442479, 737465, 1327437, 2212395, 3982311, 6637185, 19911555]

約数ペア:

[(1, 19911555), (3, 6637185), (5, 3982311), (9, 2212395), (15, 1327437), (27, 737465), (45, 442479), (79, 252045), (135, 147493), (237, 84015), (395, 50409), (711, 28005), (1185, 16803), (1867, 10665), (2133, 9335), (3555, 5601)]