21545986

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:140

約数の個数: 72

約数和(自身を含む): 43666560

約数和(自身を除く): 22120574

約数列:

[1, 2, 7, 11, 14, 22, 23, 46, 49, 77, 79, 98, 121, 154, 158, 161, 242, 253, 322, 506, 539, 553, 847, 869, 1078, 1106, 1127, 1694, 1738, 1771, 1817, 2254, 2783, 3542, 3634, 3871, 5566, 5929, 6083, 7742, 9559, 11858, 12166, 12397, 12719, 19118, 19481, 19987, 24794, 25438, 38962, 39974, 42581, 66913, 85162, 89033, 133826, 136367, 139909, 178066, 219857, 272734, 279818, 439714, 468391, 936782, 979363, 1538999, 1958726, 3077998, 10772993, 21545986]

約数ペア:

[(1, 21545986), (2, 10772993), (7, 3077998), (11, 1958726), (14, 1538999), (22, 979363), (23, 936782), (46, 468391), (49, 439714), (77, 279818), (79, 272734), (98, 219857), (121, 178066), (154, 139909), (158, 136367), (161, 133826), (242, 89033), (253, 85162), (322, 66913), (506, 42581), (539, 39974), (553, 38962), (847, 25438), (869, 24794), (1078, 19987), (1106, 19481), (1127, 19118), (1694, 12719), (1738, 12397), (1771, 12166), (1817, 11858), (2254, 9559), (2783, 7742), (3542, 6083), (3634, 5929), (3871, 5566)]