21519297

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{271}}^1$

素因数の和:470

約数の個数: 32

約数和(自身を含む): 34076160

約数和(自身を除く): 12556863

約数列:

[1, 3, 9, 17, 27, 51, 153, 173, 271, 459, 519, 813, 1557, 2439, 2941, 4607, 4671, 7317, 8823, 13821, 26469, 41463, 46883, 79407, 124389, 140649, 421947, 797011, 1265841, 2391033, 7173099, 21519297]

約数ペア:

[(1, 21519297), (3, 7173099), (9, 2391033), (17, 1265841), (27, 797011), (51, 421947), (153, 140649), (173, 124389), (271, 79407), (459, 46883), (519, 41463), (813, 26469), (1557, 13821), (2439, 8823), (2941, 7317), (4607, 4671)]