21585729

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{199}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 33408000

約数和(自身を除く): 11822271

約数列:

[1, 3, 11, 19, 33, 57, 173, 199, 209, 519, 597, 627, 1903, 2189, 3287, 3781, 5709, 6567, 9861, 11343, 34427, 36157, 41591, 103281, 108471, 124773, 378697, 654113, 1136091, 1962339, 7195243, 21585729]

約数ペア:

[(1, 21585729), (3, 7195243), (11, 1962339), (19, 1136091), (33, 654113), (57, 378697), (173, 124773), (199, 108471), (209, 103281), (519, 41591), (597, 36157), (627, 34427), (1903, 11343), (2189, 9861), (3287, 6567), (3781, 5709)]