20051955

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{643}}^1$

素因数の和:678

約数の個数: 80

約数和(自身を含む): 44884224

約数和(自身を除く): 24832269

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 81, 99, 105, 135, 165, 189, 231, 297, 315, 385, 405, 495, 567, 643, 693, 891, 945, 1155, 1485, 1929, 2079, 2835, 3215, 3465, 4455, 4501, 5787, 6237, 7073, 9645, 10395, 13503, 17361, 21219, 22505, 28935, 31185, 35365, 40509, 49511, 52083, 63657, 67515, 86805, 106095, 121527, 148533, 190971, 202545, 247555, 260415, 318285, 364581, 445599, 572913, 607635, 742665, 954855, 1336797, 1822905, 2227995, 2864565, 4010391, 6683985, 20051955]

約数ペア:

[(1, 20051955), (3, 6683985), (5, 4010391), (7, 2864565), (9, 2227995), (11, 1822905), (15, 1336797), (21, 954855), (27, 742665), (33, 607635), (35, 572913), (45, 445599), (55, 364581), (63, 318285), (77, 260415), (81, 247555), (99, 202545), (105, 190971), (135, 148533), (165, 121527), (189, 106095), (231, 86805), (297, 67515), (315, 63657), (385, 52083), (405, 49511), (495, 40509), (567, 35365), (643, 31185), (693, 28935), (891, 22505), (945, 21219), (1155, 17361), (1485, 13503), (1929, 10395), (2079, 9645), (2835, 7073), (3215, 6237), (3465, 5787), (4455, 4501)]