21250665

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6469}}^1$

素因数の和:6553

約数の個数: 24

約数和(自身を含む): 37344840

約数和(自身を除く): 16094175

約数列:

[1, 3, 5, 9, 15, 45, 73, 219, 365, 657, 1095, 3285, 6469, 19407, 32345, 58221, 97035, 291105, 472237, 1416711, 2361185, 4250133, 7083555, 21250665]

約数ペア:

[(1, 21250665), (3, 7083555), (5, 4250133), (9, 2361185), (15, 1416711), (45, 472237), (73, 291105), (219, 97035), (365, 58221), (657, 32345), (1095, 19407), (3285, 6469)]