20988555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4253}}^1$

素因数の和:4315

約数の個数: 32

約数和(自身を含む): 39204864

約数和(自身を除く): 18216309

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4253, 4935, 12759, 21265, 29771, 63795, 89313, 148855, 199891, 446565, 599673, 999455, 1399237, 2998365, 4197711, 6996185, 20988555]

約数ペア:

[(1, 20988555), (3, 6996185), (5, 4197711), (7, 2998365), (15, 1399237), (21, 999455), (35, 599673), (47, 446565), (105, 199891), (141, 148855), (235, 89313), (329, 63795), (705, 29771), (987, 21265), (1645, 12759), (4253, 4935)]