21027027

素因数分解:

$3^1\times 7^2\times {\mathrm{313}}^1\times {\mathrm{457}}^1$

素因数の和:787

約数の個数: 24

約数和(自身を含む): 32789136

約数和(自身を除く): 11762109

約数列:

[1, 3, 7, 21, 49, 147, 313, 457, 939, 1371, 2191, 3199, 6573, 9597, 15337, 22393, 46011, 67179, 143041, 429123, 1001287, 3003861, 7009009, 21027027]

約数ペア:

[(1, 21027027), (3, 7009009), (7, 3003861), (21, 1001287), (49, 429123), (147, 143041), (313, 67179), (457, 46011), (939, 22393), (1371, 15337), (2191, 9597), (3199, 6573)]