21780927

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{6779}}^1$

素因数の和:6812

約数の個数: 32

約数和(自身を含む): 39052800

約数和(自身を除く): 17271873

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 119, 153, 189, 357, 459, 1071, 3213, 6779, 20337, 47453, 61011, 115243, 142359, 183033, 345729, 427077, 806701, 1037187, 1281231, 2420103, 3111561, 7260309, 21780927]

約数ペア:

[(1, 21780927), (3, 7260309), (7, 3111561), (9, 2420103), (17, 1281231), (21, 1037187), (27, 806701), (51, 427077), (63, 345729), (119, 183033), (153, 142359), (189, 115243), (357, 61011), (459, 47453), (1071, 20337), (3213, 6779)]