19839765

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{643}}^1$

素因数の和:690

約数の個数: 48

約数和(自身を含む): 37001664

約数和(自身を除く): 17161899

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 121, 165, 187, 255, 363, 561, 605, 643, 935, 1815, 1929, 2057, 2805, 3215, 6171, 7073, 9645, 10285, 10931, 21219, 30855, 32793, 35365, 54655, 77803, 106095, 120241, 163965, 233409, 360723, 389015, 601205, 1167045, 1322651, 1803615, 3967953, 6613255, 19839765]

約数ペア:

[(1, 19839765), (3, 6613255), (5, 3967953), (11, 1803615), (15, 1322651), (17, 1167045), (33, 601205), (51, 389015), (55, 360723), (85, 233409), (121, 163965), (165, 120241), (187, 106095), (255, 77803), (363, 54655), (561, 35365), (605, 32793), (643, 30855), (935, 21219), (1815, 10931), (1929, 10285), (2057, 9645), (2805, 7073), (3215, 6171)]