21270519

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 35642880

約数和(自身を除く): 14372361

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 243, 271, 323, 459, 513, 813, 969, 1377, 1539, 2439, 2907, 4131, 4607, 4617, 5149, 7317, 8721, 13821, 15447, 21951, 26163, 41463, 46341, 65853, 78489, 87533, 124389, 139023, 262599, 373167, 417069, 787797, 1119501, 1251207, 2363391, 7090173, 21270519]

約数ペア:

[(1, 21270519), (3, 7090173), (9, 2363391), (17, 1251207), (19, 1119501), (27, 787797), (51, 417069), (57, 373167), (81, 262599), (153, 139023), (171, 124389), (243, 87533), (271, 78489), (323, 65853), (459, 46341), (513, 41463), (813, 26163), (969, 21951), (1377, 15447), (1539, 13821), (2439, 8721), (2907, 7317), (4131, 5149), (4607, 4617)]