28165725

素因数分解:

$3^4\times 5^2\times 7^1\times {\mathrm{1987}}^1$

素因数の和:2016

約数の個数: 60

約数和(自身を含む): 59655904

約数和(自身を除く): 31490179

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 63, 75, 81, 105, 135, 175, 189, 225, 315, 405, 525, 567, 675, 945, 1575, 1987, 2025, 2835, 4725, 5961, 9935, 13909, 14175, 17883, 29805, 41727, 49675, 53649, 69545, 89415, 125181, 149025, 160947, 208635, 268245, 347725, 375543, 447075, 625905, 804735, 1043175, 1126629, 1341225, 1877715, 3129525, 4023675, 5633145, 9388575, 28165725]

約数ペア:

[(1, 28165725), (3, 9388575), (5, 5633145), (7, 4023675), (9, 3129525), (15, 1877715), (21, 1341225), (25, 1126629), (27, 1043175), (35, 804735), (45, 625905), (63, 447075), (75, 375543), (81, 347725), (105, 268245), (135, 208635), (175, 160947), (189, 149025), (225, 125181), (315, 89415), (405, 69545), (525, 53649), (567, 49675), (675, 41727), (945, 29805), (1575, 17883), (1987, 14175), (2025, 13909), (2835, 9935), (4725, 5961)]