21171479

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:407

約数の個数: 24

約数和(自身を含む): 26101440

約数和(自身を除く): 4929961

約数列:

[1, 7, 29, 47, 49, 203, 317, 329, 1363, 1421, 2219, 2303, 9193, 9541, 14899, 15533, 64351, 66787, 104293, 432071, 450457, 730051, 3024497, 21171479]

約数ペア:

[(1, 21171479), (7, 3024497), (29, 730051), (47, 450457), (49, 432071), (203, 104293), (317, 66787), (329, 64351), (1363, 15533), (1421, 14899), (2219, 9541), (2303, 9193)]