20491137

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{647}}^1$

素因数の和:699

約数の個数: 40

約数和(自身を含む): 33872256

約数和(自身を除く): 13381119

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 207, 391, 459, 621, 647, 1173, 1377, 1863, 1941, 3519, 5823, 10557, 10999, 14881, 17469, 31671, 32997, 44643, 52407, 98991, 133929, 252977, 296973, 401787, 758931, 890919, 1205361, 2276793, 6830379, 20491137]

約数ペア:

[(1, 20491137), (3, 6830379), (9, 2276793), (17, 1205361), (23, 890919), (27, 758931), (51, 401787), (69, 296973), (81, 252977), (153, 133929), (207, 98991), (391, 52407), (459, 44643), (621, 32997), (647, 31671), (1173, 17469), (1377, 14881), (1863, 10999), (1941, 10557), (3519, 5823)]