19995723

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^2$

素因数の和:252

約数の個数: 36

約数和(自身を含む): 33670728

約数和(自身を除く): 13675005

約数列:

[1, 3, 9, 11, 17, 33, 51, 99, 109, 153, 187, 327, 561, 981, 1199, 1683, 1853, 3597, 5559, 10791, 11881, 16677, 20383, 35643, 61149, 106929, 130691, 183447, 201977, 392073, 605931, 1176219, 1817793, 2221747, 6665241, 19995723]

約数ペア:

[(1, 19995723), (3, 6665241), (9, 2221747), (11, 1817793), (17, 1176219), (33, 605931), (51, 392073), (99, 201977), (109, 183447), (153, 130691), (187, 106929), (327, 61149), (561, 35643), (981, 20383), (1199, 16677), (1683, 11881), (1853, 10791), (3597, 5559)]