20806875

素因数分解:

$3^5\times 5^4\times {\mathrm{137}}^1$

素因数の和:172

約数の個数: 60

約数和(自身を含む): 39231192

約数和(自身を除く): 18424317

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 125, 135, 137, 225, 243, 375, 405, 411, 625, 675, 685, 1125, 1215, 1233, 1875, 2025, 2055, 3375, 3425, 3699, 5625, 6075, 6165, 10125, 10275, 11097, 16875, 17125, 18495, 30375, 30825, 33291, 50625, 51375, 55485, 85625, 92475, 151875, 154125, 166455, 256875, 277425, 462375, 770625, 832275, 1387125, 2311875, 4161375, 6935625, 20806875]

約数ペア:

[(1, 20806875), (3, 6935625), (5, 4161375), (9, 2311875), (15, 1387125), (25, 832275), (27, 770625), (45, 462375), (75, 277425), (81, 256875), (125, 166455), (135, 154125), (137, 151875), (225, 92475), (243, 85625), (375, 55485), (405, 51375), (411, 50625), (625, 33291), (675, 30825), (685, 30375), (1125, 18495), (1215, 17125), (1233, 16875), (1875, 11097), (2025, 10275), (2055, 10125), (3375, 6165), (3425, 6075), (3699, 5625)]