21685818

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{643}}^1$

素因数の和:739

約数の個数: 64

約数和(自身を含む): 54899712

約数和(自身を除く): 33213894

約数列:

[1, 2, 3, 6, 7, 11, 14, 21, 22, 33, 42, 66, 73, 77, 146, 154, 219, 231, 438, 462, 511, 643, 803, 1022, 1286, 1533, 1606, 1929, 2409, 3066, 3858, 4501, 4818, 5621, 7073, 9002, 11242, 13503, 14146, 16863, 21219, 27006, 33726, 42438, 46939, 49511, 93878, 99022, 140817, 148533, 281634, 297066, 328573, 516329, 657146, 985719, 1032658, 1548987, 1971438, 3097974, 3614303, 7228606, 10842909, 21685818]

約数ペア:

[(1, 21685818), (2, 10842909), (3, 7228606), (6, 3614303), (7, 3097974), (11, 1971438), (14, 1548987), (21, 1032658), (22, 985719), (33, 657146), (42, 516329), (66, 328573), (73, 297066), (77, 281634), (146, 148533), (154, 140817), (219, 99022), (231, 93878), (438, 49511), (462, 46939), (511, 42438), (643, 33726), (803, 27006), (1022, 21219), (1286, 16863), (1533, 14146), (1606, 13503), (1929, 11242), (2409, 9002), (3066, 7073), (3858, 5621), (4501, 4818)]