21288.000000

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:70

約数の個数: 48

約数和(自身を含む): 1313280

約数和(自身を除く): 606651

約数列:

[1, 3, 7, 11, 19, 21, 23, 33, 49, 57, 69, 77, 133, 147, 161, 209, 231, 253, 399, 437, 483, 539, 627, 759, 931, 1127, 1311, 1463, 1617, 1771, 2793, 3059, 3381, 4389, 4807, 5313, 9177, 10241, 12397, 14421, 21413, 30723, 33649, 37191, 64239, 100947, 235543, 706629]

約数ペア:

[(1, 706629), (3, 235543), (7, 100947), (11, 64239), (19, 37191), (21, 33649), (23, 30723), (33, 21413), (49, 14421), (57, 12397), (69, 10241), (77, 9177), (133, 5313), (147, 4807), (161, 4389), (209, 3381), (231, 3059), (253, 2793), (399, 1771), (437, 1617), (483, 1463), (539, 1311), (627, 1127), (759, 931)]