20881168

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{997}}^1$

素因数の和:1040

約数の個数: 80

約数和(自身を含む): 53460864

約数和(自身を除く): 32579696

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 17, 22, 28, 34, 44, 56, 68, 77, 88, 112, 119, 136, 154, 176, 187, 238, 272, 308, 374, 476, 616, 748, 952, 997, 1232, 1309, 1496, 1904, 1994, 2618, 2992, 3988, 5236, 6979, 7976, 10472, 10967, 13958, 15952, 16949, 20944, 21934, 27916, 33898, 43868, 55832, 67796, 76769, 87736, 111664, 118643, 135592, 153538, 175472, 186439, 237286, 271184, 307076, 372878, 474572, 614152, 745756, 949144, 1228304, 1305073, 1491512, 1898288, 2610146, 2983024, 5220292, 10440584, 20881168]

約数ペア:

[(1, 20881168), (2, 10440584), (4, 5220292), (7, 2983024), (8, 2610146), (11, 1898288), (14, 1491512), (16, 1305073), (17, 1228304), (22, 949144), (28, 745756), (34, 614152), (44, 474572), (56, 372878), (68, 307076), (77, 271184), (88, 237286), (112, 186439), (119, 175472), (136, 153538), (154, 135592), (176, 118643), (187, 111664), (238, 87736), (272, 76769), (308, 67796), (374, 55832), (476, 43868), (616, 33898), (748, 27916), (952, 21934), (997, 20944), (1232, 16949), (1309, 15952), (1496, 13958), (1904, 10967), (1994, 10472), (2618, 7976), (2992, 6979), (3988, 5236)]