27991161

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{647}}^1$

素因数の和:706

約数の個数: 48

約数和(自身を含む): 48522240

約数和(自身を除く): 20531079

約数列:

[1, 3, 9, 11, 19, 23, 33, 57, 69, 99, 171, 207, 209, 253, 437, 627, 647, 759, 1311, 1881, 1941, 2277, 3933, 4807, 5823, 7117, 12293, 14421, 14881, 21351, 36879, 43263, 44643, 64053, 110637, 133929, 135223, 163691, 282739, 405669, 491073, 848217, 1217007, 1473219, 2544651, 3110129, 9330387, 27991161]

約数ペア:

[(1, 27991161), (3, 9330387), (9, 3110129), (11, 2544651), (19, 1473219), (23, 1217007), (33, 848217), (57, 491073), (69, 405669), (99, 282739), (171, 163691), (207, 135223), (209, 133929), (253, 110637), (437, 64053), (627, 44643), (647, 43263), (759, 36879), (1311, 21351), (1881, 14881), (1941, 14421), (2277, 12293), (3933, 7117), (4807, 5823)]