21715749

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{17}}^2\times {\mathrm{23}}^1$

素因数の和:88

約数の個数: 72

約数和(自身を含む): 39197760

約数和(自身を除く): 17482011

約数列:

[1, 3, 9, 11, 17, 23, 27, 33, 51, 69, 99, 121, 153, 187, 207, 253, 289, 297, 363, 391, 459, 561, 621, 759, 867, 1089, 1173, 1683, 2057, 2277, 2601, 2783, 3179, 3267, 3519, 4301, 5049, 6171, 6647, 6831, 7803, 8349, 9537, 10557, 12903, 18513, 19941, 25047, 28611, 34969, 38709, 47311, 55539, 59823, 73117, 75141, 85833, 104907, 116127, 141933, 179469, 219351, 314721, 425799, 658053, 804287, 944163, 1277397, 1974159, 2412861, 7238583, 21715749]

約数ペア:

[(1, 21715749), (3, 7238583), (9, 2412861), (11, 1974159), (17, 1277397), (23, 944163), (27, 804287), (33, 658053), (51, 425799), (69, 314721), (99, 219351), (121, 179469), (153, 141933), (187, 116127), (207, 104907), (253, 85833), (289, 75141), (297, 73117), (363, 59823), (391, 55539), (459, 47311), (561, 38709), (621, 34969), (759, 28611), (867, 25047), (1089, 19941), (1173, 18513), (1683, 12903), (2057, 10557), (2277, 9537), (2601, 8349), (2783, 7803), (3179, 6831), (3267, 6647), (3519, 6171), (4301, 5049)]