18991005

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{643}}^1$

素因数の和:841

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 14393955

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 179, 537, 643, 895, 1929, 1969, 2685, 3215, 5907, 7073, 9645, 9845, 21219, 29535, 35365, 106095, 115097, 345291, 575485, 1266067, 1726455, 3798201, 6330335, 18991005]

約数ペア:

[(1, 18991005), (3, 6330335), (5, 3798201), (11, 1726455), (15, 1266067), (33, 575485), (55, 345291), (165, 115097), (179, 106095), (537, 35365), (643, 29535), (895, 21219), (1929, 9845), (1969, 9645), (2685, 7073), (3215, 5907)]