19881477

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 37509120

約数和(自身を除く): 17627643

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 73, 77, 99, 131, 189, 219, 231, 297, 393, 511, 657, 693, 803, 917, 1179, 1441, 1533, 1971, 2079, 2409, 2751, 3537, 4323, 4599, 5621, 7227, 8253, 9563, 10087, 12969, 13797, 16863, 21681, 24759, 28689, 30261, 38907, 50589, 66941, 86067, 90783, 105193, 151767, 200823, 258201, 272349, 315579, 602469, 736351, 946737, 1807407, 2209053, 2840211, 6627159, 19881477]

約数ペア:

[(1, 19881477), (3, 6627159), (7, 2840211), (9, 2209053), (11, 1807407), (21, 946737), (27, 736351), (33, 602469), (63, 315579), (73, 272349), (77, 258201), (99, 200823), (131, 151767), (189, 105193), (219, 90783), (231, 86067), (297, 66941), (393, 50589), (511, 38907), (657, 30261), (693, 28689), (803, 24759), (917, 21681), (1179, 16863), (1441, 13797), (1533, 12969), (1971, 10087), (2079, 9563), (2409, 8253), (2751, 7227), (3537, 5621), (4323, 4599)]