19764745

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{359}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 32175360

約数和(自身を除く): 12410615

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 121, 143, 359, 385, 455, 605, 715, 847, 1001, 1573, 1795, 2513, 3949, 4235, 4667, 5005, 7865, 11011, 12565, 19745, 23335, 27643, 32669, 43439, 51337, 55055, 138215, 163345, 217195, 256685, 304073, 359359, 564707, 1520365, 1796795, 2823535, 3952949, 19764745]

約数ペア:

[(1, 19764745), (5, 3952949), (7, 2823535), (11, 1796795), (13, 1520365), (35, 564707), (55, 359359), (65, 304073), (77, 256685), (91, 217195), (121, 163345), (143, 138215), (359, 55055), (385, 51337), (455, 43439), (605, 32669), (715, 27643), (847, 23335), (1001, 19745), (1573, 12565), (1795, 11011), (2513, 7865), (3949, 5005), (4235, 4667)]