19890728

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17387}}^1$

素因数の和:17417

約数の個数: 32

約数和(自身を含む): 43817760

約数和(自身を除く): 23927032

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 143, 286, 572, 1144, 17387, 34774, 69548, 139096, 191257, 226031, 382514, 452062, 765028, 904124, 1530056, 1808248, 2486341, 4972682, 9945364, 19890728]

約数ペア:

[(1, 19890728), (2, 9945364), (4, 4972682), (8, 2486341), (11, 1808248), (13, 1530056), (22, 904124), (26, 765028), (44, 452062), (52, 382514), (88, 226031), (104, 191257), (143, 139096), (286, 69548), (572, 34774), (1144, 17387)]