20005425

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 40042080

約数和(自身を除く): 20036655

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 59, 75, 99, 137, 165, 177, 225, 275, 295, 411, 495, 531, 649, 685, 825, 885, 1233, 1475, 1507, 1947, 2055, 2475, 2655, 3245, 3425, 4425, 4521, 5841, 6165, 7535, 8083, 9735, 10275, 13275, 13563, 16225, 22605, 24249, 29205, 30825, 37675, 40415, 48675, 67815, 72747, 88913, 113025, 121245, 146025, 202075, 266739, 339075, 363735, 444565, 606225, 800217, 1333695, 1818675, 2222825, 4001085, 6668475, 20005425]

約数ペア:

[(1, 20005425), (3, 6668475), (5, 4001085), (9, 2222825), (11, 1818675), (15, 1333695), (25, 800217), (33, 606225), (45, 444565), (55, 363735), (59, 339075), (75, 266739), (99, 202075), (137, 146025), (165, 121245), (177, 113025), (225, 88913), (275, 72747), (295, 67815), (411, 48675), (495, 40415), (531, 37675), (649, 30825), (685, 29205), (825, 24249), (885, 22605), (1233, 16225), (1475, 13563), (1507, 13275), (1947, 10275), (2055, 9735), (2475, 8083), (2655, 7535), (3245, 6165), (3425, 5841), (4425, 4521)]