20666558

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:173

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 16105282

約数列:

[1, 2, 11, 22, 23, 46, 47, 79, 94, 121, 158, 242, 253, 506, 517, 869, 1034, 1081, 1738, 1817, 2162, 2783, 3634, 3713, 5566, 5687, 7426, 9559, 11374, 11891, 19118, 19987, 23782, 39974, 40843, 81686, 85399, 130801, 170798, 219857, 261602, 439714, 449273, 898546, 939389, 1878778, 10333279, 20666558]

約数ペア:

[(1, 20666558), (2, 10333279), (11, 1878778), (22, 939389), (23, 898546), (46, 449273), (47, 439714), (79, 261602), (94, 219857), (121, 170798), (158, 130801), (242, 85399), (253, 81686), (506, 40843), (517, 39974), (869, 23782), (1034, 19987), (1081, 19118), (1738, 11891), (1817, 11374), (2162, 9559), (2783, 7426), (3634, 5687), (3713, 5566)]