28261863

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 49920000

約数和(自身を除く): 21658137

約数列:

[1, 3, 7, 9, 21, 29, 31, 63, 87, 93, 203, 217, 261, 279, 499, 609, 651, 899, 1497, 1827, 1953, 2697, 3493, 4491, 6293, 8091, 10479, 14471, 15469, 18879, 31437, 43413, 46407, 56637, 101297, 108283, 130239, 139221, 303891, 324849, 448601, 911673, 974547, 1345803, 3140207, 4037409, 9420621, 28261863]

約数ペア:

[(1, 28261863), (3, 9420621), (7, 4037409), (9, 3140207), (21, 1345803), (29, 974547), (31, 911673), (63, 448601), (87, 324849), (93, 303891), (203, 139221), (217, 130239), (261, 108283), (279, 101297), (499, 56637), (609, 46407), (651, 43413), (899, 31437), (1497, 18879), (1827, 15469), (1953, 14471), (2697, 10479), (3493, 8091), (4491, 6293)]