19921000

素因数分解:

$2^3\times 5^3\times {\mathrm{11}}^1\times {\mathrm{1811}}^1$

素因数の和:1843

約数の個数: 64

約数和(自身を含む): 50880960

約数和(自身を除く): 30959960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 125, 200, 220, 250, 275, 440, 500, 550, 1000, 1100, 1375, 1811, 2200, 2750, 3622, 5500, 7244, 9055, 11000, 14488, 18110, 19921, 36220, 39842, 45275, 72440, 79684, 90550, 99605, 159368, 181100, 199210, 226375, 362200, 398420, 452750, 498025, 796840, 905500, 996050, 1811000, 1992100, 2490125, 3984200, 4980250, 9960500, 19921000]

約数ペア:

[(1, 19921000), (2, 9960500), (4, 4980250), (5, 3984200), (8, 2490125), (10, 1992100), (11, 1811000), (20, 996050), (22, 905500), (25, 796840), (40, 498025), (44, 452750), (50, 398420), (55, 362200), (88, 226375), (100, 199210), (110, 181100), (125, 159368), (200, 99605), (220, 90550), (250, 79684), (275, 72440), (440, 45275), (500, 39842), (550, 36220), (1000, 19921), (1100, 18110), (1375, 14488), (1811, 11000), (2200, 9055), (2750, 7244), (3622, 5500)]