638926785

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{225371}}^1$

素因数の和:225395

約数の個数: 40

約数和(自身を含む): 1308960576

約数和(自身を除く): 670033791

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 225371, 676113, 1126855, 1577597, 2028339, 3380565, 4732791, 6085017, 7887985, 10141695, 14198373, 18255051, 23663955, 30425085, 42595119, 70991865, 91275255, 127785357, 212975595, 638926785]

約数ペア:

[(1, 638926785), (3, 212975595), (5, 127785357), (7, 91275255), (9, 70991865), (15, 42595119), (21, 30425085), (27, 23663955), (35, 18255051), (45, 14198373), (63, 10141695), (81, 7887985), (105, 6085017), (135, 4732791), (189, 3380565), (315, 2028339), (405, 1577597), (567, 1126855), (945, 676113), (2835, 225371)]